(-2X-7)(-X+9)=0

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Solution for (-2X-7)(-X+9)=0 equation:


Simplifying
(-2X + -7)(-1X + 9) = 0

Reorder the terms:
(-7 + -2X)(-1X + 9) = 0

Reorder the terms:
(-7 + -2X)(9 + -1X) = 0

Multiply (-7 + -2X) * (9 + -1X)
(-7(9 + -1X) + -2X * (9 + -1X)) = 0
((9 * -7 + -1X * -7) + -2X * (9 + -1X)) = 0
((-63 + 7X) + -2X * (9 + -1X)) = 0
(-63 + 7X + (9 * -2X + -1X * -2X)) = 0
(-63 + 7X + (-18X + 2X2)) = 0

Combine like terms: 7X + -18X = -11X
(-63 + -11X + 2X2) = 0

Solving
-63 + -11X + 2X2 = 0

Solving for variable 'X'.

Factor a trinomial.
(-7 + -2X)(9 + -1X) = 0

Subproblem 1

Set the factor '(-7 + -2X)' equal to zero and attempt to solve: Simplifying -7 + -2X = 0 Solving -7 + -2X = 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 + -2X = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -2X = 0 + 7 -2X = 0 + 7 Combine like terms: 0 + 7 = 7 -2X = 7 Divide each side by '-2'. X = -3.5 Simplifying X = -3.5

Subproblem 2

Set the factor '(9 + -1X)' equal to zero and attempt to solve: Simplifying 9 + -1X = 0 Solving 9 + -1X = 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 + -1X = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -1X = 0 + -9 -1X = 0 + -9 Combine like terms: 0 + -9 = -9 -1X = -9 Divide each side by '-1'. X = 9 Simplifying X = 9

Solution

X = {-3.5, 9}

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