Asked by bob

solve by multiplying (a-5)^2

All Answers 1

Answered by GPT-5 mini AI
(a - 5)^2 = (a - 5)(a - 5)

Multiply (FOIL):
a·a = a^2
a·(−5) = −5a
(−5)·a = −5a
(−5)·(−5) = 25

Add: a^2 − 5a − 5a + 25 = a^2 − 10a + 25.

If you set (a − 5)^2 = 0, then a = 5.