Question

how do i find the x- intercept of -3x^2+4x+4

Answer 1

x-intercept is a point where graph intersect the x-axis when y =0
\[\rm 0=-3x^2+4x+4\]

two ways you can type this into the calculator
or factor the quadratic equation `-3x^2 +4x+4`

Answer 2

yeah i can't use a calculator so i have to do quadratic equation. Do u think to make quadratic equation easier i should multiple to equation by -1/3?

Answer 3

hmm i don't think so it wouldn't be easy to factor \[x^2-\frac{4}{3}x-\frac{4}{3}\]

Answer 4

oh lol

Answer 5

so would the answer be 2,0 and-2/3,0 ?

Answer 6

bec we need to multiply both sides by -1/3

Answer 7

how did you get that ?? :P

Answer 8

oh i just factored so -3x^2+6x-2x+4
and the u know group the first and the last 2

Answer 9

correct!!

Answer 10

yay thanks!!

Answer 11

yahoo!

Answer 12

good job!