Question

multiply
1. 3x² ( 8ax² + 7bx )
2. ( 8a+b ) ( 7a+8b - 3c )
3. ( 7a + b + c ) ( 7a+b-c )
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Answer 1

Answer:

1. 24ax⁴+21bx³

2. 54a2m²+71ab-24ac

3. 21a²+14ab+8b²-c²

Step-by-step explanation:

1. (3x²×8ax²) + (3x²×7bx)

= 24ax⁴+21bx³

2. 8a(7a+8b-3c) + b(7a+8b-3c)

= 56a²+64ab-24ac+7ab+8b²-3bc

= 56a²+71ab-24ac

3. 7a(7a+b-c)+b(7a+8b-c)+c(7a+b-c)

= 21a²+7ab-7ac+7ab+8b²-bc+7ac+bc-c²

= 21a²+14ab+8b²-c²