Which is equivalent to the following expression? (2x^2+4xy-y^2)+(x^2+3xy-y^2) a. 3x^2-7xy-2y^2 b. 3x^2+7xy+2y^2 c. 3x^2+7xy-2y^2 d. 3x^2-7xy+2y^2

Answer C : 3x^2+7xy-2y^2

equivalent to the following expression

Combine like terms

2x^2 + x^2 is 3x^2

4xy+3xy is 7xy

-y^2-y^2 is -2y^2

So expression becomes

Answer  C is correct

answer: 91

step-by-step explanation:

a² + b²= c²

24² + 7² = c²

c= 25