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UNO [17]
3 years ago
14

What is the product? (-2x -9y^2) (-4x -3)

Mathematics
2 answers:
vesna_86 [32]3 years ago
5 0

Answer:

8x^2+6x+36xy^2+27y^2

Step-by-step explanation:

Given expression,

(-2x -9y^2)(-4x -3)

By associative property,

=-2x(-4x -3)-9y^2(-4x -3)

Again by associative property,

=-2x(-4x)-2x(-3)-9y^2(-4x)-9y^2(-3)

=8x^2+6x+36xy^2+27y^2

Hence,

(-2x -9y^2)(-4x -3)=8x^2+6x+36xy^2+27y^2

svlad2 [7]3 years ago
3 0

Your product would be:

8x^2+6x+36xy^2+27y^2

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One ordered pair (a,b) satisfies the two equations ab^4 = 384 and a^2 b^5 = 4608. What is the value of a in this ordered pair?
Alekssandra [29.7K]

Answer: a = 3∛2

<u>Step-by-step explanation:</u>

ab⁴ = 384     --> a = 384/b⁴

Substitute a = 384/b⁴ into the second equation to solve for "b".

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\bigg(\dfrac{384}{b^4}\bigg)^2\cdot b^5=4608\\\\\\\dfrac{147,456b^5}{b^8}=4608\\\\\\\dfrac{147,456}{b^3}=4608\\\\\\\dfrac{147,456}{4608}=b^3\\\\\\32=b^3\\\\\\\sqrt[3]{32} =b\\\\\\2\sqrt[3]{4} =b

Substitute b = 2∛4 into the first equation to solve for "a".

ab⁴ = 384

a(2∛4)⁴ = 384

        a  = 384/(2∛4)⁴

        a = 24/4∛4

           = 6/∛4

           = 6(∛2)/2

           = 3∛2

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