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4 years ago

10

Expand (a-1) (a+2). please helpp!!

2 answers:

GenaCL600 [577]4 years ago

6 0

Do the foil method. first, outer, inner, last.

Yanka [14]4 years ago

6 0

<span> (a-1) (a+2)
=a^2 - a + 2a - 2
= a^2 + a - 2</span>

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Sloan [31]

The general equation of a line is y = mx+b. The line is horizontal and the slope (m) of a horizontal line is 0. So y = 0x + b = b. Since the y intercept (where it crosses the y axis) is -1 (or b = -1) then you have the equation y = -1.
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4 years ago

Please help quick!!<br>

Nataly [62]

Hi !

$∫ \frac{t}{t + 1}dt$

We need to prove that it is equal to

$∫ \frac{u - 1}{u}du$

As per given options, Substitute <em>u</em> by <em>t</em><em>+</em><em>1</em><em> </em>

$= > ∫ \frac{u - 1}{t + 1} du$

<em>Then</em><em> </em><em>given</em><em> </em><em>t</em><em> </em><em>=</em><em> </em><em>u</em><em>-</em><em>1</em>

$= > ∫ \frac{t}{t + 1} du$

Then substitue the third given value also

$= > ∫ \frac{t}{t + 1} dt$

Therefore, it's <u>proved</u>

~<em>Hop</em><em>e</em><em> </em><em>i</em><em>t</em><em> </em><em>h</em><em>e</em><em>l</em><em>p</em><em>s</em>

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Nat2105 [25]

$98.90 is the correct answer

hope this helped

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3 years ago

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Step-by-step explanation:

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