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3 years ago

Solve by taking the square root of both sides. 3(x+4)^2-24=0

2 answers:

6 0

3(x+4)^2-24=0

3(x+4)^2 = 24

(x+4)^2 = 24/3

(x+4)^2 = 8

(x+4)² = (2√2)² ⇒ x+4 = 2√2 ⇒ x = 2√2 - 4

Anna71 [15]3 years ago

6 0

$3(x+4)^2-24=0 \\
3(x+4)^2=24\\
(x+4)^2=8\\
x+4=\sqrt8 \vee x+4=-\sqrt8\\
x=-4+\sqrt8 \vee x=-4-\sqrt8\\
x=-4+2\sqrt2 \vee x=-4-2\sqrt2$

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