21(p^2-1)=40p

Simple and best practice solution for 21(p^2-1)=40p 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 21(p^2-1)=40p equation:


Simplifying
21(p2 + -1) = 40p

Reorder the terms:
21(-1 + p2) = 40p
(-1 * 21 + p2 * 21) = 40p
(-21 + 21p2) = 40p

Solving
-21 + 21p2 = 40p

Solving for variable 'p'.

Reorder the terms:
-21 + -40p + 21p2 = 40p + -40p

Combine like terms: 40p + -40p = 0
-21 + -40p + 21p2 = 0

Factor a trinomial.
(-3 + -7p)(7 + -3p) = 0

Subproblem 1

Set the factor '(-3 + -7p)' equal to zero and attempt to solve: Simplifying -3 + -7p = 0 Solving -3 + -7p = 0 Move all terms containing p to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + -7p = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -7p = 0 + 3 -7p = 0 + 3 Combine like terms: 0 + 3 = 3 -7p = 3 Divide each side by '-7'. p = -0.4285714286 Simplifying p = -0.4285714286

Subproblem 2

Set the factor '(7 + -3p)' equal to zero and attempt to solve: Simplifying 7 + -3p = 0 Solving 7 + -3p = 0 Move all terms containing p to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -3p = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -3p = 0 + -7 -3p = 0 + -7 Combine like terms: 0 + -7 = -7 -3p = -7 Divide each side by '-3'. p = 2.333333333 Simplifying p = 2.333333333

Solution

p = {-0.4285714286, 2.333333333}

See similar equations:

| (6r+13)(r+12)=0 | | 2x-3=5+2x | | 7X-7=8X+4 | | -3x+6y=-12 | | 6x-3(2+2x)=-6 | | y=6x+20 | | -5x+y=-2 | | x^2-9x-50=0 | | 3x^2+1=193 | | 7x^2+44+12=0 | | x=4+8y+y^3 | | 4x^2+3=19 | | x-4=y^3+8y | | ln(2x+4)-ln(2x+1)=3 | | 72=30-8a | | -7x-2y=-13 | | 14x^2-65+9=0 | | -4x+33=25 | | -5x-y=21 | | 2+6(3x+7)= | | 45x^2-44x+7=0 | | -4x+y=6 | | 7t+11-9t=15 | | 3x-3=-3x+3 | | 7x-20=36 | | 5x^2-46x+9=0 | | 0.80x-0.40(40+x)=0.20(40) | | -3x+y=-5 | | x(7x+12)=2x^2-17x+6 | | 9x-(5x+9)=5x+48 | | 8x+y=-16 | | -(2x-3)=23 |

Equations solver categories