Question

7. From the sum of 9x²- 12x+ 4 and - 4x²+5x +8,subtract 9x²- 10x+12.​

Answer 1

Step-by-step explanation:

(9x²-12x+4)+(4x²+5x+8)

we will add the the like terms

9x²+4x²-12x+5x+4+8

13x²-7x+12

now we will subtract the term from it

(13x²-7x+12 )-(9x²-10x+12)

now the signs will change as there is minus before bracket

13x²-7x+12-9x²+10x-12

add the like terms

13x²-9x²-7x+10x+12-12

4x²+3x(answer)