Maths-
SAT
Easy
Question
y=(x+3)(x-7)
y=x-7
If (x, y) is a solution to the given system of equations, which of the following could be the value of x?
- 2
- -3
- 3
- -2
The correct answer is: -2
y=(x+3)(x-7)
y=x-7
(x+3)(x-7) = (x -7)
x + 3 = 1
x = -3 + 1 = -2
Substitute x = -2 in any equation
y = (x - 7)
= - 2 - 7 = -9.
Substitute x = -2 in any equation
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