(a^2-3a-5)-(-a^2-7a+4)=

Simple and best practice solution for (a^2-3a-5)-(-a^2-7a+4)= equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for (a^2-3a-5)-(-a^2-7a+4)= equation:


Simplifying
(a2 + -3a + -5) + -1(-1a2 + -7a + 4) = 0

Reorder the terms:
(-5 + -3a + a2) + -1(-1a2 + -7a + 4) = 0

Remove parenthesis around (-5 + -3a + a2)
-5 + -3a + a2 + -1(-1a2 + -7a + 4) = 0

Reorder the terms:
-5 + -3a + a2 + -1(4 + -7a + -1a2) = 0
-5 + -3a + a2 + (4 * -1 + -7a * -1 + -1a2 * -1) = 0
-5 + -3a + a2 + (-4 + 7a + 1a2) = 0

Reorder the terms:
-5 + -4 + -3a + 7a + a2 + 1a2 = 0

Combine like terms: -5 + -4 = -9
-9 + -3a + 7a + a2 + 1a2 = 0

Combine like terms: -3a + 7a = 4a
-9 + 4a + a2 + 1a2 = 0

Combine like terms: a2 + 1a2 = 2a2
-9 + 4a + 2a2 = 0

Solving
-9 + 4a + 2a2 = 0

Solving for variable 'a'.

Begin completing the square.  Divide all terms by
2 the coefficient of the squared term: 

Divide each side by '2'.
-4.5 + 2a + a2 = 0

Move the constant term to the right:

Add '4.5' to each side of the equation.
-4.5 + 2a + 4.5 + a2 = 0 + 4.5

Reorder the terms:
-4.5 + 4.5 + 2a + a2 = 0 + 4.5

Combine like terms: -4.5 + 4.5 = 0.0
0.0 + 2a + a2 = 0 + 4.5
2a + a2 = 0 + 4.5

Combine like terms: 0 + 4.5 = 4.5
2a + a2 = 4.5

The a term is 2a.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2a + 1 + a2 = 4.5 + 1

Reorder the terms:
1 + 2a + a2 = 4.5 + 1

Combine like terms: 4.5 + 1 = 5.5
1 + 2a + a2 = 5.5

Factor a perfect square on the left side:
(a + 1)(a + 1) = 5.5

Calculate the square root of the right side: 2.34520788

Break this problem into two subproblems by setting 
(a + 1) equal to 2.34520788 and -2.34520788.

Subproblem 1

a + 1 = 2.34520788 Simplifying a + 1 = 2.34520788 Reorder the terms: 1 + a = 2.34520788 Solving 1 + a = 2.34520788 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + a = 2.34520788 + -1 Combine like terms: 1 + -1 = 0 0 + a = 2.34520788 + -1 a = 2.34520788 + -1 Combine like terms: 2.34520788 + -1 = 1.34520788 a = 1.34520788 Simplifying a = 1.34520788

Subproblem 2

a + 1 = -2.34520788 Simplifying a + 1 = -2.34520788 Reorder the terms: 1 + a = -2.34520788 Solving 1 + a = -2.34520788 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + a = -2.34520788 + -1 Combine like terms: 1 + -1 = 0 0 + a = -2.34520788 + -1 a = -2.34520788 + -1 Combine like terms: -2.34520788 + -1 = -3.34520788 a = -3.34520788 Simplifying a = -3.34520788

Solution

The solution to the problem is based on the solutions from the subproblems. a = {1.34520788, -3.34520788}

See similar equations:

| 8t=134 | | X(3)-4=41 | | 4b^2-4b=99 | | f(n)=40+1.5n | | x^3-8x+4=0 | | 3x^2-8-20=0 | | f(n)=1.50+40n | | 3r^2-2r-24=-3 | | (43)6=4n | | 3x-5=-14x | | C+1/2c | | (x^2+6x-5)+(-x^2-3x-1)= | | y=4/5x+1 | | 5p=6.45 | | 3=x+11 | | 2x^2-24x+144=0 | | -30=4x-5c(-3x-13) | | y-7=-2x-10 | | -(8y+4)-(-7y-5)=-4 | | 2+4m=30 | | x=0.4(304-0.6(304-x)) | | 12/7k+10/7-4k+3/7+3/7k-6 | | k/66+8=5 | | 9(4x-3)=3(12x+2) | | x^3-10=12 | | -7n+4=-17 | | 6m^2+7m-110=0 | | p=35h-560 | | 1+5x+5x=1 | | 4+6n-2=8n+6-3n | | -5=v+2+6v | | -3x+7(3x+22)=10 |

Equations solver categories