Question

i) What should be added to (x-y) to get 2x?
ii) Find the coefficient of y² in 9py².
iii)Find the value of 3x²-4x-7 when x=-3
Answer the question in with step by step explanation . The best answer will be marked as brainliest. ​

Answer 1

i) What should be added to (x-y) to get 2x?

let z be added

so z+x-y=2x

z=2x-x+y

z=x+y

ii) Find the coefficient of y² in 9py².

9p is coefficient of y²

iii)Find the value of 3x²-4x-7 when x=-3

at x= -3

3(-3)²-4(-3)-7

3×9+12-7

27+12-7

27+5

32

Answer 2

i) What should be added to (x-y) to get 2x?

x+y

ii) Find the coefficient of y² in 9py².

9p

iii)Find the value of 3x²-4x-7 when x=-3

32