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Level 1

100

r²+6r+8

(r+4)(r+2)

200

n²+11n+28

(n+7)(n+4)

300

a²+8a+12

(a+6)(a+2)

400

k²-19k+90

(k-9)(k-10)

500

v²+v-90

(v+10)(v-9)

Level 2

100

p²-3p

p(p-3)

200

k²-6k

k(k-6)

300

r²-8r

r(r-8)

400

3b²-24b

3b(b-8)

500

k²-k

k(k-1)

Level 3

100

5b²-245

5(b+7)(b-7)

200

2p²-2

2(p+1)(p-1)

300

4x²-16

4(x+2)(x-2)

400

3n²-48

3(n+4)(n-4)

500

48m²-75

3(4m+5)(4m-5)

Level 4

100

3m²+54m+240

3(m+10)(m+8)

200

6x²-42x

6x(x-7)

300

2n²+12n

2n(n+6)

400

5x²+75x+280

5(x+8)(x+7)

500

5n²+30n

5n(n+6)