4(x^2-4.75x-15.75)=0

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Solution for 4(x^2-4.75x-15.75)=0 equation: 


Simplifying
4(x2 + -4.75x + -15.75) = 0

Reorder the terms:
4(-15.75 + -4.75x + x2) = 0
(-15.75 * 4 + -4.75x * 4 + x2 * 4) = 0
(-63 + -19x + 4x2) = 0

Solving
-63 + -19x + 4x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-9 + -4x)(7 + -1x) = 0


Subproblem 1
Set the factor '(-9 + -4x)' equal to zero and attempt to solve:

Simplifying
-9 + -4x = 0

Solving
-9 + -4x = 0

Move all terms containing x to the left, all other terms to the right.

Add '9' to each side of the equation.
-9 + 9 + -4x = 0 + 9

Combine like terms: -9 + 9 = 0
0 + -4x = 0 + 9
-4x = 0 + 9

Combine like terms: 0 + 9 = 9
-4x = 9

Divide each side by '-4'.
x = -2.25

Simplifying
x = -2.25

Subproblem 2
Set the factor '(7 + -1x)' equal to zero and attempt to solve:

Simplifying
7 + -1x = 0

Solving
7 + -1x = 0

Move all terms containing x to the left, all other terms to the right.

Add '-7' to each side of the equation.
7 + -7 + -1x = 0 + -7

Combine like terms: 7 + -7 = 0
0 + -1x = 0 + -7
-1x = 0 + -7

Combine like terms: 0 + -7 = -7
-1x = -7

Divide each side by '-1'.
x = 7

Simplifying
x = 7
Solution
x = {-2.25, 7}

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