Question

write the value of algebraic expression 5a squared + 4a - 2 when a = -2

Answer 1

{5 × (-2)}^2+4×-2-2
{-10}^2+(-8)-2
100+10
110
ans = 110

Answer 2

Given, a = - 2


= > 5a² + 4a - 2

= > 5( - 2 )² + 4( - 2 ) - 2



Taking - 2 common,


= > ( - 2 ) { 5( - 2 ) + 4 + 1 }


= > ( - 2 ) { - 10 + 5 }


= > ( - 2 ) ( - 5 )


= > 10
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