(9+5i)(9-5i)

@jhonyy9

i put it in the calculator it says 106..

so prob 106?

it might be 121

lol, uh well, if u can't explain the steps to me then plz don't answer

oh

i did mental math sorry :/

\(\color{#0cbb34}{\text{Originally Posted by}}\) @XluisX i did mental math sorry :/ \(\color{#0cbb34}{\text{End of Quote}}\) it's all good lol

i say 106 is safe. i did get the answer from google. but idk up to u

No this isn't a calculator problem

The variable i represents and imaginary number

yeah ^

*an

Read this if you need an introduction on imaginary numbers: https://www.khanacademy.org/math/algebra2/x2ec2f6f830c9fb89:complex/x2ec2f6f830c9fb89:imaginary/a/intro-to-the-imaginary-numbers

well i learned them alr today but i'm just still confused on how to do it

\(\color{#0cbb34}{\text{Originally Posted by}}\) @ohyhyh i put it in the calculator it says 106.. \(\color{#0cbb34}{\text{End of Quote}}\) You actually got the right answer.

But you need to know how right?

told yuh

but i respect needing an explanation

wait so i think ik how andi thought you werent supposed to use a calculator for these seeing as they are complex (imaginary) numbers....

i just searched it up on google and it gave me that

on the calc

yeah but imaginary numbers aren't supposed to be found with a calculator i thought

idrk. im doing 7th grade advanced so... your older

Its 9^2 + 5^2 = 106 because the I variable cancels out.

prob smarter to lol

I not the best at imaginary numbers lol so you can check in with other people if you need more clarification. Hope this helps though.

so the -5 doesn't mean anything ? or are you talking ab -25i^2 and since i^2 is -1 then -25 * -1 is 25 and 81+25 is 106?

im out of answers. this is all the other guy

now haha

i'll just ask dude lol, ty tho

np

Ok sounds good. Sorry I couldn't help more

rip

(9+5i)(9-5i) use formula a^2 -b^2 = (a-b)(a+b) 9^2 - (-5i)^2 i^2 = -1 and (-5)(-5)= 25 => = -25 81 - (-25) = 81 +25 = 106 @mxddi3

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