book Maths Puzzle Numerical Ability

Factor:
ab + 7b - 3a - 21

Read Solution (Total 0)

book Other Question

please help me perform the indicated operation and simplify

-8x + 6 over x plus -6x + 5 over 8x

and

x over x^2-16 minus 5 over x^2+5x+4 please find the illegal values of c in the multiplication statement
c2 - 3c - 10 / c2 + 5c - 14 . c2 - c - 2 / c2 - 2c - 15
thank you!!