Question

X(A+B)-Y(A+B) 的解是什么 6Q(P+Q)-9P(P+Q) 的解是什么?

Answer 1

(1),x(a+b)-y(a+b)

=ax+bx-ay-by

=a(x-y)+b(x-y)

=(a+b)(x-y)

(2),6Q(P+Q)-9P(P+Q)

=(6Q-9P)(P+Q)

=3(2Q-3P)(P+Q)

(3),(M+N)(P+Q)-4P(P+Q)

=(M+N-4P)(P+Q)

(4),P(X-Y)的平方-5B(Y-X)

=P(X-Y)的平方+5B(X-Y)

=[P(X-Y)+5B](X-Y)

=(PX-PY+5B)(X-Y)