Question x-2-2-

2.2 Nonlinear Equations in One Variable - Quadratic solving (factoring, quadratic formula, completing square)
0:00

x - 2 2 = 3 x + 34

What is the smallest solution to the given equation?

Enter your answer:

x - 2 2 = 3 x + 34 What is the smallest solution to the

Hard-difficulty · SAT Math · Nonlinear Equations in One Variable — Quadratic solving (factoring, quadratic formula, completing square). Read the question above, select your answer, and check the full explanation below to understand exactly why the correct choice works.

Answer explanation

The correct answer is -3. Squaring both sides of the given equation yields x-22=3x+34, which can be rewritten as x2-4x+4=3x+34. Subtracting 3 x and 34 from both sides of this equation yields x2-7x-30=0. This quadratic equation can be rewritten as x-10x+3=0. According to the zero product property, x-10x+3 equals zero when either x-10=0 or x+3=0. Solving each of these equations for x yields x=10 or x=-3. Therefore, the given equation has two solutions, 10 and -3 . Of these two solutions, -3 is the smallest solution to the given equation.