Answers

1.) (x+3)(x+3) = x² + 3x + 3x + 9
x² + 6x + 9
y = x² + 6x + 9

2.) y = (x + 1)²

3.) y = (x + 5)²

4.) 3x² + 6x + 8 = 3(x² + 2x) + 8
3(x² + 2x + 1) − 3 + 8
3(x + 1)² + 5
y = 3(x + 1)² + 5

5.) =x2 + 2x + 3x + 6

=(x2 + 2x) + (3x + 6)

=x(x + 2) + (3x + 6)

=x(x + 2) + 3(x + 2)

=(x + 2)(x + 3)

6.) a) 3 seconds

b) 19 meters

c) ball was punted at 1 meters high

t=0

y=-2(t-3)2+19

y=-2(0-3)2+19

y=-2(3)2+19

y=-2(9)+19

y=-18+19

y=1

Quadratics