Question

Hola me ayudan por favor ​

Answer 1

• -a(9a-3a+5a)= -a(6a+5a)= - a(11a)= - 11a^2
• -2b( - 8a+9a-a)= - 2b(-8a +8a)= - 2b(0)=0
• (x+2)(x-3)=
• ${x}^{2} + 2x - 3x + (2)( - 3) \\ {x}^{2} - x - 6$
• (2a - 3b)(3a-7b)=
• $(2a)(3a) - (2a)(7b) - (3a)(3b) + (3b)(7b) \\ 6 {a}^{2} - 14ab - 9ab + 21 {b}^{2} \\ 6 {a}^{2} - 23ab + 21 {b}^{2}$
• (x-2)(x^2 +2x+4) = x^3 - 2^3 = x^3 - 8