Question

x square - 4 x minus 21 is equal to zero factorise​

Answer 1

Answer:

Hope it helps✌✌✌✌✌✌✌✌✌✌✌

Answer 2

Answer:

x = -3 and +7

Step-by-step explanation:

x^2 - 4x - 21 = 0

x^2 - 7x + 3x - 21 = 0

x(x - 7) +3(x - 7) = 0

(x + 3) (x - 7) = 0

x = -3, 7