Question

In the following, show that the given numbers are the solution of the given equation:

x² − 7x + 12 = 0; x = 4

Answer 1

Given:

x² − 7x + 12 = 0

Verification

Substitute x = 4 in the left-hand side (LHS):

x² − 7x + 12

= 4² − 7(4) + 12

= 16 − 28 + 12

= 0

Since LHS = 0, which equals the right-hand side,

x = 4 is a solution of x² − 7x + 12 = 0