Question

If x= 1 and y = 7 is a solution of the equation a²x - ay + 12, find the values of a.​

Answer 1

x=1,and y=7

so,

a^2x-ay+12=0

a^2×1-a×7+12=0

a^2-7a+12=0

a^2-3a-4a+12=0

a(a-3)-4(a-3) =0

(a-4)(a-3) =0

a-4=0

a=4

a-3=0

a=3

a=4, 3