(5a+7)(5a-7)=

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Solution for (5a+7)(5a-7)= equation:


Simplifying
(5a + 7)(5a + -7) = 0

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

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

Multiply (7 + 5a) * (-7 + 5a)
(7(-7 + 5a) + 5a * (-7 + 5a)) = 0
((-7 * 7 + 5a * 7) + 5a * (-7 + 5a)) = 0
((-49 + 35a) + 5a * (-7 + 5a)) = 0
(-49 + 35a + (-7 * 5a + 5a * 5a)) = 0
(-49 + 35a + (-35a + 25a2)) = 0

Combine like terms: 35a + -35a = 0
(-49 + 0 + 25a2) = 0
(-49 + 25a2) = 0

Solving
-49 + 25a2 = 0

Solving for variable 'a'.

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

Add '49' to each side of the equation.
-49 + 49 + 25a2 = 0 + 49

Combine like terms: -49 + 49 = 0
0 + 25a2 = 0 + 49
25a2 = 0 + 49

Combine like terms: 0 + 49 = 49
25a2 = 49

Divide each side by '25'.
a2 = 1.96

Simplifying
a2 = 1.96

Take the square root of each side:
a = {-1.4, 1.4}

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