Question

(x-5)(2x+7)=0

solve equation

Answer 1

Simplifying
(x + -5)(2x + 7) = 0

Reorder the terms:
(-5 + x)(2x + 7) = 0

Reorder the terms:
(-5 + x)(7 + 2x) = 0

Multiply (-5 + x) * (7 + 2x)
(-5(7 + 2x) + x(7 + 2x)) = 0
((7 * -5 + 2x * -5) + x(7 + 2x)) = 0
((-35 + -10x) + x(7 + 2x)) = 0
(-35 + -10x + (7 * x + 2x * x)) = 0
(-35 + -10x + (7x + 2x2)) = 0

Combine like terms: -10x + 7x = -3x
(-35 + -3x + 2x2) = 0

Solving
-35 + -3x + 2x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-7 + -2x)(5 + -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 '(5 + -1x)' equal to zero and attempt to solve:

Simplifying
5 + -1x = 0

Solving
5 + -1x = 0

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

Add '-5' to each side of the equation.
5 + -5 + -1x = 0 + -5

Combine like terms: 5 + -5 = 0
0 + -1x = 0 + -5
-1x = 0 + -5

Combine like terms: 0 + -5 = -5
-1x = -5

Divide each side by '-1'.
x = 5

Simplifying
x = 5
Solution
x = {-3.5, 5}

Answer 2

*was just going to copy and past that :D*

*smacked myself*

Answer 3

Lol

Answer 4

two solutions for this one

Answer 5

x = {-3.5, 5}

Answer 6

rofl...
(x-5) = 0 or (2x-7) = 0
x =5 or x = 3.5

Answer 7

x = {-3.5, 5}

Why read his.!

*He beat me again to it.*

*smacked myself again*

*harder this time*

Answer 8

LOL