Question

answer this with steps plzz​

Answer 1

Answer:

4) let t he third expression be A  (4a²-7a+8)+(a²-8+3a)+A=8a²-7+8a

4a²-7a+8+a²-8+3a+A=8a²-7+8a

4a²+a²-7a+3a+8-8+A=8a²-7+8a

5a²-4a+A=8a²-7+8a

A=8a²-7+8a-(5a²-4a)

A=8a²-7+8a-5a²+4a

A=3a²-7+12a

5) let the number be B

(4x²-7+8x)-B=x²-7x+6

4x²-7+8x-(x²-7x+6)=B

4x²-7+8x-x²+7x-6=B

11x²-1+15x=B

HOPE THIS HELPS  

PLZ MARK AS BRAINLIEST