Diagnostic Pre Test
TEST
Active
The square of a number is 12 less than 7 times the number. What is the number?
• 4 or-3
0 -4 or 3
0 -3 or 4
3 or 4

We can make this:

x^2=7x-12

This becomes:

x^2-7x+12=0

Factored form:

(x-4)(x-3)=0

The numbers are either 4 or 3, so D is correct

Hope this helped!

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.

the answer is d

hope this