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3 years ago

If xy = a and x2 + y2 = b, which of the following is equivalent to 9b – 18a ?

Mathematics

1 answer:

Llana [10]3 years ago

5 0

Answer:

A) (3x -3y)²

Step-by-step explanation:

9b -18a = 9(x² +y²) -18xy

= 9x² -18xy +9y²

= (3x -3y)² . . . . . matches choice A

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yawa3891 [41]

$\bf{1) \ x^4-61x^2+900=0 }$

Applying the factorization method, for example:

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$\bf{2) \ x^4-25x^2+144=0 }$

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7 0

2 years ago

In the figure below, segment AC is congruent to segment AB:

stepladder [879]

Answer: A. "Segment AD bisects angle CAB." is the right answer.

Step-by-step explanation:

Given : In ΔABC ,AC≅AB.

⇒∠ACB=∠CBA....(1) (∵ angles opposite to equal sides of a triangle are equal )

Now in ΔACD and ΔABD

AD=AD (common)....(2)

Here we need one more statement to prove the triangles congruent that is only statement (A) fits in it.

If AD bisects ∠CAB then ∠CAD=∠BAD..(3)

Now again Now in ΔACD and ΔABD

∠ACB=∠CBA [from (1)]

AD=AD [common]

∠CAD=∠BAD [from (3)]

So by ASA congruency criteria ΔADC≅ΔABD.

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3 years ago

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Ugo [173]

Answer:

1x0

2 x 11

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Hope this helps! :) Please rate brainliest

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What is the answer to 5x5

poizon [28]

Answer:

Step-by-step explanation:

5x5

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3 years ago

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