If a=3, b=-5 fond the value of (2a+3b) (4a sq- 6ab+9b square)

Question

asked Sep 28, 2022 178k views

1 Answer

Afshar · Answer 1 · 2022-10-04T06:36:01+0000

Explanation:

(2a+3b)(4a²-6ab+9b²

(2a+3b){(2a)²-2a×3b+(3b)²}

Because (a³+b³)=(a+b)(a²-ab+b²)

Therefore,

(2a+3b){(2a)²-2a×3b+(3b)²}

=(2a)³+(3b)³

By substituting the values , we get