Question

3(6x×x+7x-9)-7(3x×x+3x-4)​

Answer 1

Answer:

3(6x×x+7x-9)-7(3x×x+3x-4)

3(6x²+7x-9)-7(3x²+3x-4)

18x²+21x-27-21x²+21x-28

collect like terms

18x²-21x²+21x+21x-27-28

-3x²+42x-55

the answer is -3x²+42x-55

Answer 2

right answer is -3x^2+1