Question

284. 1) (c-4) (d-3); 2) (a-10) (-a-2); 3) (x+y)(x+1): 4) (-p+q) (-1-9)​

Answer 1

284. 1) (c-4) (d-3)=cd-3c-4d+12 2) (a-10) (a-2)=

$a {}^{2} - 12a + 20$

3) (x+y)(x+1)=

$x {}^{2} + x + xy + y$

4) (-p+q) (-1-9)=10p-10q