100
x(x+4)
What is x^2+4x
100
2x(x+3)
What is 2x^2+6x
100
2x(x+2+5)
What is 2x^2+14x
200
t(t+10)
What is t^2+t10
200
3x(x+9)
What is 3x^2+27x
200
2x(x+7+2)
What is 2x^2+18x
300
x(x+7)
What is x^2+7x
300
2x(x+2)
What is 2x^2+4x
400
x(12+x)
What is x^2+12x
400
2x(12+x)
What is 2x^2+24x
500
5x(x+4)
What is 5x^2+20x