Question

1)(m-7)(m+7)
2)(6a+10b)(10b-6a)
3)(x+9)^2
4)(3a-8b)^2

Answer 1

1)(m-7)(m+7)=m²-49
2)(6a+10b)(10b-6a)=60*a*b-36*a²+100*a*b-60*a*b=100*a*b-36*a²
3)(x+9)^2=x²+18*x+81
4)(3a-8b)^2 =9*a²-48*a*b+64*b²