Question

(8.3x^2+0.9xy+3.6) - (7.4^2-1.7xy+6.4)

Answer 1

I think the second term in the second bracket is 7.4x^2
We open the second bracket and since there is a negative sign outside the bracket, we have to change the signs of all the three terms

8.3x^2 - 7.4x^2 + 0.9xy + 1.7xy + 3.6 - 6.4
0.9x^2 + 2.6xy - 2.8

Answer 2

thank you!