Question

simplify the expression and find It's value when a=5 and b=-3 (i)2(a2+ab)+3-ab? (ii)ab+b2?​

Answer 1

Answer:

1.38, 2.19

Step-by-step explanation:

1.= 2(5×2+5×3)+3-5×3

= 2×25+3-15

=50+3-15

=53-15

=38

2.= 5×3+2×2

= 15+4

=19

hope it helps!

Answer 2

1.

$\begin{gathered}2( {a }^{2} + ab) + 3 - ab \\ value \: \: of \: \: a = 5 \: \: and \: \: b = ( - 3) \\ \\ 2( {(5)}^{2} + 5 \times ( - 3)) + 3 - (5 \times ( - 3)) \\ \\ 2(25 - 15) + 3 - ( - 15) \\ \\ 2 \times 10 + 3 + 15 \\ \\ 20 + 18 \\ \\ 38\end{gathered}$