Question

I need help with both of these problems. Thank you!

Answer 1

1. 10
2. 15ab

Explanation:

1. The square of the binomial is ...

(* -2m)^2 = *^2 -4m* +4m^2

Matching terms, you find ...

*^2 = 100

-4m* = -40

Both of these equations tell you the value of * is 10.

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2. Same deal. Multiply ou the square and see what you have.

(3a +2.5b)^2 = 9a^2 +15ab +6.25b^2

The term missing on the right side of the given equation is 15ab.