Question

7. Simplify the following expressions and then find the numerical
Values for X=-2.
(1) 3(2x-4)+x oppon 2 +5
(ii) -2(-3x+5)- 2(x +4)
A​

Answer 1

Answer:

x2+3(2x-4)+5

=x2+6x-12+5

=x2+6x-7

now , when we put x=-2

(-2)2+6(-2)-7

=4-12-7

= -8-7

= -15

Answer 2

Answer:

(-15)

Step-by-step explanation:

x^2+3(2x-4)+5

=x^2+6x-12+5

=x^2+6x-7

x= (-2 )

(-2)^2+6(-2)-7

=4 (-12) -7

= (-8) -7  

= -15