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sineoko [7]
4 years ago
9

Solve the equation by taking the square root 4(x+1)^2=100

Mathematics
1 answer:
ELEN [110]4 years ago
5 0

Answer:

Step-by-step explanation:

4(x+1)²=100

(x+1)²= 5²

(x+1)²- 5² = 0

(x+1-5)(x+1+5) = 0  by identity : a² - b ² = (a - b) (a+b)

(x - 4 ) (x+6) =0

x - 4 = 0 or x+6 = 0

x = 4  or x = - 6

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