Question

If x^2 -aX+21= (x-7)(x-3), the value of a will be.​

Answer 1

Answer:

x²-ax+21=(x-7)(x-3)

x²-ax+21=x²-3x-7x+21

-ax=-10x

ax=10x

a=10

hence value of a is 10

Answer 2

Step-by-step explanation:

If x^2 -aX+21= (x-7)(x-3), the value of a will be.