Question

(ii) (4a2 - 6ab + 9b) (2a + 3b); a = 2, b = 1​

Answer 1

Answer:

-35

Step-by-step explanation:

a = 2 , b = 1

[4(2)2 - 6(2)(1) + 9(1)] [2(2) + 3(1)]

[4(4) - 12 + 9] [4 + 3]

[16 - 12 + 9] [7]

[16 - 21] [7] -----------------(by BODMAS rule)

[-5] [7]

-35

Answer 2

Answer:

-12

Step-by-step explanation:

a=2

b=1

4 multiply 2 multiply 2-6 multiply 2 multiply 1+9 multiply 1+2 multiply 2+3 multiply 1

=16-12+9+4+3

=16-12+9+7

=16-12+16

=16-28

=-12