Question

(a+5b) (2a-b) =????
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Answer 1

Answer:

$(a + 5b)(2a - b) \\ = a(2a - b) + 5a(2a - b) \\ = 2 {a}^{2} - ab + 10 {a}^{2} - 5ab \\ = 12 {a}^{2} - 6ab$

Hope it helps you mate, wish you all the best.

Answer 2

Answer:

2 2 + 9 − 5 2

Step-by-step explanation:

( + 5 )( 2 − )

( 2 − ) + 5 ( 2 − )

( 2 − ) + 5 ( 2 − )  

2 2 − + 5 ( 2a-b)

2 2 − + 5 ( 2− )

2 2 − + 1 0 − 5 2

2 2 − + 1 0 − 5 2  

2 2 + 9 − 5 2

= 2 2 + 9 − 5 2