3 years ago

Solve:(x+5)^2 =16 Solve: a^2 +12a + 36 = 225

1 answer:

amm18123 years ago

6 0

Solve:(x+5)^2 =16

(x+5)^2 =16
x^2 + 10x + 25 - 16 = 0
x^2 + 10x + 9 = 0
(x+9)(x+1) = 0

x + 9 = 0
x = -9

x +1 = 0
x = -1

answer: x=-1 and x = -9

Solve: a^2 +12a + 36 = 225

a^2 +12a + 36 = 225
a^2 +12a + 36 - 225 = 0
a^2 +12a - 189 = 0
(a-9)(a+21) = 0

a - 9 = 0
a = 9

a + 21 = 0
a = -21

answer: a = -21 and a = 9

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