Question

(3x-6)(3x+5)

Answer 1

i tried using foil buttt it says it wrong

Answer 2

what foil????

Answer 3

you need multiplie term by term

Answer 4

first outside inside last

Answer 5

so than will get ???

Answer 6

9x-30??? idk!

Answer 7

9x^2 +15x ...

continue it

Answer 8

( 3x-6) (3x+5)=0
9x^2 +15x -18x-30=0
3x^2-x-10=0
d=121 ......> x1=2
x2=-10/6

Answer 9

ok the fist two steps i got but the 3rd??? 3x^2-x-10?

Answer 10

got it!
im so bad at this!

Answer 11

thank you so much!

Answer 12

ok I'll explain step by step :
\[9x^2 + 15x-18x-30=0 ( \div 3 ) \]
\[3x^2 -x-10=0 ( the main equation)\]
then we calculate the d ( featured)
d=b^2-4 ac = 121 \[\sqrt{d}=11\]
\[x1=(-b-\sqrt{d})/2a = -10/6\]
\[x2= (-b+\sqrt{d})/2a = 2\]

Answer 13

so the -10/6 you need to simplifie again

Answer 14

-10/6 = -(10/6) = -(5/3) !!