x=-1 find the value -1^2 +8×(-1)+7
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the answer will be zero as - 1 to the power 2 is equal to 1 and 8 into minus 1 is equal to minus 8 and it is given + 7 so the equation will be 1 - 8 + 7 so we get - 7 + 7 that will be cancelled out and give zero
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