Question

简单整式计算(-3a-2)(3a-2)(3+2a)(-3+2a)（2x+3)(3x-2)6p(p+9)-4q(p+q)m

Answer 1

(-3a-2)(3a-2) =-(3a+2)(3a-2)=-(9a^2-2^2)=-9a^2+4

(3+2a)(-3+2a)=(2a)^2-3^2=4a^2-9

（2x+3)(3x-2) =6x^2+5x-6

6p(p+9)-4q(p+q) =6p^2+54p-4pq-4q^2

m(a-3)+2(3-a)=ma-3m+6-2a