Question

1)What must be added to 2a^2 - 7ab + 5b^2 to get a^2 + 4ab -3b^2
2)The perimeter of a triangle is (17x + 5y - 11z) metres. If its two sides are (5x + 3y + z) metres and (4x + y - 7z) metres, find its third side.​

Answer 1

Answer:

I am in 7th class only

Step-by-step explanation:

sorry I can't help you