Question

Practil
1.
Expand.
(1) (a +2)(a - 1)
(4) (13 + x)(13 - x)
(2) (m - 4)(m + 6)
16) (3) (p + 8)(p -3)
(5) (3x + 4v)(3x + 5y) (6) (9x – 5t)(9x + 371
(8) (x++) (4-1 (9)(+4) (-9)
3 + x)(13 - x)
(3) (2+3) (m-)
(5) (3x
+-
71-
Y
+​

Answer 1

Answer

(1).(a+2)(a-1)

=. a^2 +(2+(-1) )+2*(-1) (X+a)(X+b)=x^2+(a+b)X+ab

a^2+1-2

a^2-1