Quadratic Quiz Review

Easy factoring

100

x²-8x+7

(x-7)(x-1)

200

x²-9

(x-3)(x+3)

300

5r²-15r

5r(r-3)

400

-k³-9k²-18k

-k(k+6)(k+3)

500

-2x²-16x+18

-2(x-1)(x+9)

imaginary

100

i⁵⁶

i

200

i⁹²²

-1

300

(3-2i)-(4+3i)

-1-5i

400

(2i)(3i)(7i)

-42i

500

(3-2i)(4+i)

14-5i

factoring

100

3x²+19x-18=-4

x=2/3 x=-7

200

5m²-30=5m

m=3 m=-2

300

15x²+21=8x²-52x

x=-3/7 x=-7

400

4x²-9=0

x=3/2 x=-3/2

500

14x²+127x+58=2+8x

x=-8 x=-1/2

solving mixed

100

8(5x+3)(x-4)=0

x=4, x=-3/5

200

x²=x+20

x=-4 x=5

300

3(x²-5)=7

x=+-sqrt(66)/3

400

(2x-1)²=36

x=7/2 x=-5/2

500

3x²+5x-32=4x-8

x=-3 x=8/3

square root method

100

x²=-9

x=3i x=-3i

200

2x²-1=11

x=sqrt(6) x=-sqrt(6)

300

(x-4)²=-16

x=4+4i x=4-4i

400

6x²-9=-120

x=isqrt(74)/2 x=-1sqrt(74)/2

500

x²+6=-x²+62

x=2sqrt(7) x=-2sqrt(7)