Question

7. Find the value of each of the following
expressions when x = -1, y = -2 and z = 2.
(a) -2x (3x - 4y) + 2y (6y - 9z) + 2z (4z - x)
(b) 7 (x - y - z?) – 2 (2 - x2)​

Answer 1

Answer:

a)162 ( one hundred sixty two)

b)-15 (fifteen)

Answer 2

Answer:

(a) -2*-1 (3*-1 -4*-2) + 2*-2(6*-2 - 9*2) + 2*2(4*2-*-1)

2(-3+8) + -4(-12-18) + 4(8+1)

2(5) -4(-30) + 4(9)

10+120+36

130+36

166..is the answer....☺️

(b). 7(-1-*-2-2) - 2(2-*-1*2)

7 (-1+2-2) - 2(2+2)

7(-1) -2(4)

-7 -8

-15...is the answer...☺️