Question

Q1. Simplify the following expressions and then find the numerical values for x = -2.
(i) 3(2x – 4) + x² + 5
(ii) -2(-3x + 5) – 2(x + 4)

Answer 1

Answer:

i) 3[2(-2)-4]+(-2)²+5

=3(-2-4)+2+5

=3(-6)+7

=-18+7

=-18

ii)-2[-3(-2)+5]-2(-2+4)

=-2(6+5)-2+4

=2×11+2

=22+2

=24

Step-by-step explanation:

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Answer 2

the breadth of the rectangle is 15 m and the perimeter of the rectangle is 90 m . find the length of the rectangle


the breadth of the rectangle is 15 m and the perimeter of the rectangle is 90 m . find the length of the rectangle