Exam review

[brisk iron]

need help simplifying: (√5 + 3√3)(2√5 - 4√2)

[opaque turtle]

Distributing might be a good first step

[brisk iron]

ik how like radicals and stuff work

but like

havent done a question like that

so it would be

(√5 * 2√5) (3√3 * -4√2)

[opaque turtle]

It would not be that

Nor sure where all the extra multiplications came from

[brisk iron]

oh yea

😅

wait so should it be

(√5 * 2√5 + √5 * -4√2) (2√5 * 3√3 2√5*-4√2)

[opaque turtle]

You're kinda getting it, but still off the mark

[brisk iron]

the signs?

[opaque turtle]

You need to recall your distributive law

[brisk iron]

-2√5

kk yea

i see

[opaque turtle]

$a(b+c)=ab+ac$

[lethal iron]

SWR

[brisk iron]

need help simplifying: (√5 + 3√3)(2√5 - 4√2)

kk

let me do it again 1 sec

[opaque turtle]

Or better yet, foil law: $(a+b)(c+d)=ab+ad+bc+cd$

[lethal iron]

SWR

[opaque turtle]

Gtg gl

[brisk iron]

alr ty

wait b4 u go

is this right

= √5 * 2√5 - √5 * 4√2 + 3√3 * 2√5 - 3√3 * 4√2

🥺 @opaque turtle