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strojnjashka [21]
3 years ago
14

23. * MULTIPLE CHOICE Which is the correct factorization of -45x^2 + 20y^2

Mathematics
1 answer:
skad [1K]3 years ago
7 0

Answer:

c)-5(3x+2y)(3x-2y)

Step-by-step explanation:

1) lets find out if -45 and 20 have a GCF

-45 and 20 are both dividable by -5 so

-5(9x^2-4y^2)

1) you can see that 9 and -4 are perfect square so:

-5(3x+2y)(3x-2y)

            Recheck:

1) lets use FOIL to see if this is right(if its right we will get back our original equation)

-5(9x^2-6xy+6xy-4y^2)

-5(9x^2-4y^2)

-45x^2+20y^2

hope this helps!

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Answer:

x-intercept = 30/6 = 5

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Step-by-step explanation:

calculate the Y-intercept:

Notice that when x = 0 the value of y is 6/1 so this line "cuts" the y axis at y=6.00000

y-intercept = 30/5 = 6/1 = 6.00000

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Answer:

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Read more on Brainly.com - brainly.com/question/2012372#readmore

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