Question

a. (x-2).(x+3)
b. (2a-5).(2a+6)
c. (a-3b).(a+x)
d. (1-a).(a+1)
e. (3ab-5x).(3ab+2)

Answer 1

a)
$(x - 2)(x + 3) \\ {x}^{2} + 3x - 2x - 6 \\ {x}^{2} + x - 6$
b)
$(2a - 5)(2a + 6) \\ 4 {a}^{2} + 12a - 10a - 30 \\ 4 {a}^{2} + 2a - 30$
c)
$(a - 3b)(a + x) \\ {a}^{2} + ax - 3a - 3xb$
d)

$(1 - a)(a + 1) \\ a +1 - {a}^{2} - a \\ 1 - {a}^{2}$
e)
$(3ab - 5x)(3ab + 2) \\ 9 {a}^{2} {b}^{2} + 6ab - 15xab - 10x$