Q1. Simplify the following expressions and then find the numerical values for x = -2.
(i) 3(2x - 4) + x2 + 5
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Step-by-step explanation:
3(2x-4)+x^2+5
=6x-12+x^2+5
=x^2+6x-7
putting x= -2
(-2)^2+6×(-2)-7
=4-12-7
=4-19
= -15
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