Question

1. (m-4) (m+6) 2. (7x+8y)³​

Answer 1

Answer:

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Step-by-step explanation:

1=m^2+2m-24

Answer 2

Step-by-step explanation:

1. (m-4) (m+6)

=using identity (x+a)(x+b)=x²+(a+b)x +ab

=(m) ²+(-4+6)m+(-4)(6)

=m²+2m-24

2. (7x+8y)²

= using identity (a+b)³= a³+b³+3a²b+3ab²

= (7x)³ + (8y) ³ + 3(7x)²(8y) +3(7x)(8y) ²

=343x³ + 512y³+1179x²y +1344xy²