3 years ago

Factor out completely 3v^2+2v+8

Mathematics

1 answer:

Aloiza [94]3 years ago

7 0

Answer:

(3v-4)(v+2)

Step-by-step explanation:

First v must be 3v since there are no other factors of 3

I just kind of guessed 2 and 4 and then put them into an order that worked.

Sorry that's really vauge :/

hope it helped though

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The line with equation x-3y-27=0 meets the parabola y²=4x at two points. Find their coordinates

lesantik [10]

$x-3y-27=0\\
y^2=4x\\\\
x-3y-27=0\\
x=\frac{y^2}{4}\\\\
\frac{y^2}{4}-3y-27=0\\
y^2-12y-108=0\\
y^2-12y+36-144=0\\
(y-6)^2=144\\
y-6=-12 \vee y-6=12\\
y=-6 \vee y=18\\\\
x=\frac{(-6)^2}{4} \vee x=\frac{18^2}{4}\\
x=\frac{36}{4} \vee x=\frac{324}{4}\\
x=9 \vee x=81\\\\
\boxed{(9,-6),(81,18)}
$