Question

22. For a = -1 and b = 2, evaluate the following expressions -
(i) 3a - 26
(ii) - 5ab + 2a
iii) 3b2 - 4a​

Answer 1

Answer:

(i) 3*(-1)-26= -3-26=-29

(ii) -5*(-1)*(2)+2*(-1)=10-2=8

(iii) 3*2*2-4*(-1)=16

Answer 2

Answer:

(i) 3a - 26

3(-1) - 26

- 3 - 26

= $\fbox{ - 29}$

(ii) - 5ab + 2a

- 5(-1)(2) + 2(-1)

10 - 2

= $\fbox{8}$

(iii) 3b² - 4a

3(2) - 4(-1)

6 - (-4)

6 + 4

= $\fbox{10}$