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macjatta
Group Title
Rewrite:
1. (x/2 +y^2)^2
2. 12xy + 4x^2+9y^2
Also brief explain the step to getting your answer?
 one year ago
 one year ago
macjatta Group Title
Rewrite: 1. (x/2 +y^2)^2 2. 12xy + 4x^2+9y^2 Also brief explain the step to getting your answer?
 one year ago
 one year ago

This Question is Closed

nimo956 Group TitleBest ResponseYou've already chosen the best response.1
1. Use the FOIL method for multiplying polynomials (First, Outside, Inside, Last) (x/2 + y^2)^2 = (x/2 + y^2) * (x/2 + y^2) = (1/4)*x^2 + (1/2)*x*y^2 + (1/2)*x*y^2 + y^4 = (1/4)*x^2 + x*y^2 + y^4 2. Here you have to do the opposite of what you did in problem 1. There's an x^2 and a y^2, so I know that it will have to take the form (a*x + b*y)^2, where a and b are some numbers. Since we have 4x^2, I will guess that a = 2, since 2^2 = 4. I will also guess that b = 3, since 3^2 = 9. The answer is then (2x + 3y)^2. If we expand this out using the FOIL method, we see that we get the same thing, including the 12xy.
 one year ago
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