Question

Simplify x(2x-1) +5 and find its value at x = -1​

Answer 1

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$x(2x - 1) + 5 \\ \\ \implies - 1( - 2 - 1) + 5 \\ \\ \implies 2 + 1 + 5 \: \: \: \: \: \: \: \: \: \: \: \: \: \\ \\ \implies \boxed{8} \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:$

so, value of expression is 8