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zysi [14]
3 years ago
6

What are the solutions to the quadratic equation 3(x - 4)2 = 75?

Mathematics
1 answer:
Lera25 [3.4K]3 years ago
5 0

3(x-4)²=75 //:3

(x-4)²=25

(x-4)²-25=0

x²+x+9x-9=0

x(x+1)-9(x+1)=0

(x+1)(x-9)=0

x+1=0    x-9=0

x=-1     x=9

<u>x=-1 and x=9</u>

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