STAAR Review 2

Simplify: (2x⁴-4x²+5x+2) ÷ (x+2)

• 2x³-8x²+21-40+56/(x+2)

• 2x³-8x²+16x-27+ 52/(x+2)

• 2x³-8x²+16x-27+56/(x+2)

• 2x²-8x+21-40/(x+2)

Factor 9x²-64

• (3x-8)(3x+8)

• (2x-8)(2x+8)

• (3x-4)(3x+4)

• (3x-8)²

How many real solutions does x²-8x+16 = 0 have?

• 0

• 1

• 2

• infinitely many

Find the value of the discriminant: 4x²-7x+8

• √79

• √-79

• -79

• -7±i√79/8

Write the equation in vertex form:
y = -2x²+16x+4

• y=-2(x-4)²+4

• y =-2(x+4)²+36

• y=-2(x+4)²+4

• y =-2(x-4)²+36

The quadratic whose roots are -3 and 4.

• x²+x-12

• x²-x + 12

• x²+x+12

• x²-x-12

What is the vertex:
y = 2(x-3)²+18

• (-3,-18)

• (3,-18)

• (-3,18)

• (3,18)

Which equation is perpendicular to y = 2x + 5?

• y = -1/2x + 7

• y = 1/2x + 7

• y = 2x + 7

• y = -2x + 7

What is the equation of the line that passes through (0,4) and (5,0)? 

• y = -4/5x + 0

• y = -4/5x + 5

• y = -4/5x + 9

• y = -4/5x + 4

Which quadratic is the widest?

• y = -3/4x²+4x+1

• y=2x²-3x+7

• y=-4x²+9

• y=7/5x²-5x+1