Question

Q8. If a = 3 and b = 5, find the value of: (a) a2 - b2 (b) a3 + b3 + 2ab (c) 7a²b - 3ab (d) a² + b2 - ab -​

Answer 1

Step-by-step explanation:

(a) (3)2 - (5)2 = 9 -25 = 16.

(b) (3)3 + (5)3 + 2 (3)(5)

= 9+15 +30

= 54

(c) 7 (3)2(5) - 3 (3)(5)

= 7( 45) - 3 (15)

= 315 - 45

= 270

(d) (3)2 -5(2) - (3)(5)

= 9 - 10 - 15

= - 16

It helps you. .

Answer 2

If a = 3 and b = 5, find the value of: (a) a2 - b2 (b) a3 + b3 + 2ab (c) 7a²b - 3ab (d) a² + b2 - ab -

Answer :-

a) 16

b) 54

c) 270

d) -16

Hope this helps you ☺️....