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rjkz [21]
4 years ago
8

3. A positive number is 56 less than its square. Find the number.

Mathematics
1 answer:
raketka [301]4 years ago
4 0

Answer:8

Step-by-step explanation:

X+56=x^2

X^2-x-56=0

X^2-8x+7x-56=0

X(x-8)+7(x-8)=0

(X+7)(x-8)=0

X+7=0 or x-8=0

X=-7 or x=8

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