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Mathematics 20 Online
OpenStudy (baby_bear69):

http://prntscr.com/a2zozu Check this please ? (: @jhonyy9

jhonyy9 (jhonyy9):

so b. and c. you see them right - yes ?

jhonyy9 (jhonyy9):

ok. but what is about a. ?

OpenStudy (baby_bear69):

yes

jhonyy9 (jhonyy9):

so than are you sure about a. ?

jhonyy9 (jhonyy9):

try rewriting it like a square

jhonyy9 (jhonyy9):

like difference of two squares

jhonyy9 (jhonyy9):

do you can ?

OpenStudy (baby_bear69):

5x-10???

jhonyy9 (jhonyy9):

not is right (5x)^2 = 25x^2 but there are different letters exponent - the 25 is right with 5 squared

jhonyy9 (jhonyy9):

and for the second term for 100 = 10^2 but there are not just 100 - yes ?

OpenStudy (baby_bear69):

im still confused .-.

jhonyy9 (jhonyy9):

how is this exercise there exactly please ?

jhonyy9 (jhonyy9):

25h^8 -100j^4 yes ?

OpenStudy (baby_bear69):

so its A,B,C?

jhonyy9 (jhonyy9):

but i need you see how you prove that a. is sure right - ok. ?

jhonyy9 (jhonyy9):

step by step 25=5^2 h^8 = ?

OpenStudy (baby_bear69):

10^2?

jhonyy9 (jhonyy9):

yes but with letters what you do ?

jhonyy9 (jhonyy9):

h^8 = ? is a square or not ?

OpenStudy (baby_bear69):

yes

jhonyy9 (jhonyy9):

square of what ?

jhonyy9 (jhonyy9):

ok i will help you in this but the second term you need prove it alone that is square sure - ok. ?

jhonyy9 (jhonyy9):

so h^8 = (h^4)^2 yes ?

OpenStudy (baby_bear69):

yeah

jhonyy9 (jhonyy9):

ok so prove the 100j^4 = ?

OpenStudy (baby_bear69):

10j^2?

jhonyy9 (jhonyy9):

yes but use please parentheses because 10 need being squared too not just how you have wrote there j - ok ?

jhonyy9 (jhonyy9):

so (10j^2)^2

OpenStudy (baby_bear69):

ohhh okay thank you!

jhonyy9 (jhonyy9):

np was my pleasure good luck bye

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