4 years ago

Please help me with expansion and factorization of quadratic expressions. a) -4x^2 + 2x^2

Mathematics

1 answer:

Flura [38]4 years ago

8 0

Answer:-2x^2(2-1)

Step-by-step explanation:

-4x^2 + 2x^2=-2x^2(2 - 1)

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<img src="https://tex.z-dn.net/?f=%5Cint%5Climits%5E2_1%20%7Bx%5E%7B2%7D-8x%2B8%20%7D%20%5C%2C%20dx" id="TexFormula1" title="\in

12345 [234]

Answer:

${ \underline{ \sf{\int\limits^2_1 {x^{2}-8x+8 } \, dx} \: = \: - 1}}$

Step-by-step explanation:

${ \tt{\int\limits^2_1 {x^{2}-8x+8 } \, dx}} \\ \\ = { \tt{[ \frac{ {x}^{3} }{3} - 4 {x}^{2} + 8x ] {}^{2} _{1}}}$

Substitute x with the limits:

$= { \tt{( \frac{ {2}^{3} }{3} - 4( {2)}^{2} + 8(2)) - ( \frac{ {1}^{3} }{3} - 4( {1)}^{2} + 8(1)) }} \\ = { \tt{( \frac{8}{3} - \frac{11}{3} )}} \\ \\ = { \tt{ - 1}}$

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3 years ago

Which of the following gives an example of a set that is closed under multiplication?

riadik2000 [5.3K]

A The product of an even number and an even number

4 0

3 years ago

Find the size of angle a

ozzi

Answer:

36 degrees

Step-by-step explanation:

4a+3a+2a+a=360

10a=360

A=36

6 0

3 years ago

Which algebraic expression represents “the class was divided into four equal groups”?

Alex17521 [72]

The last answer, because the class is being divided into four groups. So the class number is not known, thus it is represented by “w” and divided by four.

4 0

3 years ago

question is ,four children saved £29 to go on a coach. They each saved the same amount. How much did each saved

Andreas93 [3]

If they saved £29 all together, and if each of them saved the same amount,
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(Before decimalization in 1971, £7.25 would have been £7 and 5s .)

5 0

3 years ago

Read 2 more answers