Question

Will choose brainliest!!!
Find a polynomial, which if substituted for M will make the equation an identity: M + (5x2 –2xy) = 6x2 +9xy –y2

Answer 1

Answer: you just solve for M

M = x^2 + 11xy – y^2

Step-by-step explanation:

M + (5x^2 –2xy) = 6x^2 +9xy–y^2

M = 6x^2–5x^2 + 9xy+2xy – y^2

M = x^2 + 11xy – y^2

Check:

x^2 + 11xy – y^2 + 5x^2 – 2xy

6x^2 + 9xy – y^2

Answer 2

Answer:

Step-by-step explanation:

5x^2+9xy+2y^2+x=3x^2-2xy-y^2

3x^2-2xy-y^2-5x^2+9xy+2y^2=x

(3-5)x^2-(9+2)xy-(3)y^2=x

-2x^2-11xy-3y^2=x