Question

Simplify 4x(2x− y) − 3x (x − 2y) − 2x + 1 and find its value for x= -1 and y= 2.

Answer 1

Answer:

2x

2

−3y+3x

2

+5x

2

+5x−7−7x+2y

=10x

2

−2x−y−7

At x=−1 and y=2,

10(−1)

2

−2(−1)−2−7

10+2−2−7

Answer 2

Answer:

4

Step-by-step explanation:

Given:x=-1,y=2

4*(-1)[2*(-1) - (2)] - 3*(-1)[(-1)-2*(2)] - 2*(-1)+1

-4[-2-2]-(-3)[-1-4]-(-2)+1

(-4*-4) +(3*-5) +2+1

16-15+3

4