Question

Simplify: (21x^3y^4) / (-7xy)
A. -3x^2y^3
B. -3xy
C. 14x^2y^3
D. 14xy
My answer: A PLease show me how to get the answer my teacher is a told brat.

Answer 1

@pooja195

Answer 2

@Nnesha

Answer 3

@Awolflover1 @zepdrix

Answer 4

\[\huge\rm \frac{ x^m }{ x^n } = x^{m-n}\]
move exponent from bottom to the top of fraction (if bases are the same )

Answer 5

\[\large\rm \frac{21x^3y^4}{ -7xy} = -\frac{ 21 }{ 7 } \times \frac{ x^3 }{ x } \times \frac{ y^4 }{ y }\]

Answer 6

that not right the / spouse to mean divid

Answer 7

yeah ik

Answer 8

what's not correct ??

Answer 9

nothing I though you though that was a fraction

Answer 10

yep that's a fraction :-)

Answer 11

or you can factor x^3
remember exponent rule when you multiply same bases you should add their exponents \[\huge\rm x^m \times x^n = x^{m+n}\]
so you can write \[\large\rm x^3 = x \times x \times x \]

Answer 12

\(\color{blue}{\text{Originally Posted by}}\) @Nnesha
\[\large\rm \frac{21x^3y^4}{ -7xy} = -\frac{ 21 }{ 7 } \times \frac{ x^3 }{ x } \times \frac{ y^4 }{ y }\]
\(\color{blue}{\text{End of Quote}}\)
\[\large\rm -\frac{ 21 }{ 7 } \times \frac{ x \times x \times x }{ x } \times \frac{ y^4 }{ y }\]
now cancel ot x

Answer 13

so their is only 2 x left

Answer 14

^^yep
x times x can be written as = ???
hint exponent rule x^m times x^n = x^{m+n}

Answer 15

okay thanks

Answer 16

got it ??

Answer 17

so what's ur answer ??

Answer 18

oops sorry -3x^2y^3