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RUDIKE [14]
2 years ago
8

1. Find a if x³ + ax² - x -8 is divisible by x -1​

Mathematics
1 answer:
Amanda [17]2 years ago
6 0

Answer:

a = 8

Step-by-step explanation:

x-1 = 0

x = 1

let x³ + ax² -x -8 be p(x)

hence, p(1) = (1)³ + a(1)² -1 -8 = 0    (since, x-1 is a factor)

= 1 + a - 1-8

= a - 8 = 0

therefore, a = 8

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Differential cos^2x dy/dx =e^y-tanx​
gulaghasi [49]

Answer:

y=t−1+ce

−t

where t=tanx.

Given, cos

2

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⇒

dx

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x=tanxsec

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x ....(1)

Here P=sec

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x⇒∫PdP=∫sec

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xdx=tanx

∴I.F.=e

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Multiplying (1) by I.F. we get

e

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dx

dy

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ysec

2

x=e

tanx

tanxsec

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x

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ye

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xdx

Put tanx=t⇒sec

2

xdx=dt

∴ye

t

=∫te

t

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t

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⇒y=t−1+ce

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8 0
2 years ago
Which expression is equivalent to ^4sqrt6/^3sqrt2?
BigorU [14]

\dfrac{\sqrt[4]6}{\sqrt[3]2}=6^\frac{1}{4}:2^\frac{1}{3}=6^\frac{1\cdot3}{4\cdot3}:2^{\frac{1\cdot4}{3\cdot4}}=6^\frac{3}{12}:2^\frac{4}{12}=(6^3)^\frac{1}{12}:(2^4)^\frac{1}{12}\\\\=216^\frac{1}{12}:16^\frac{1}{12}=(216:16)^\frac{1}{12}=\sqrt[12]{\dfrac{216}{16}}=\sqrt[12]{\dfrac{27}{2}}\\\\\text{Answer:}\ 1)\ \sqrt[12]{\dfrac{27}{2}}

4 0
2 years ago
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Use any method to solve the equation. If necessary, round to the nearest hundredth.7x2 − 16x = 8
Semmy [17]
7x^2 - 16x - 8 = 0

using the quadratic formula x = [ -(-16)+/- sqrt((-16^2 - 4*7-8]  / 2*7

 =   (16 +/1 sqrt 480)  / 14

=  2.71, -0.42     to nearest hundredth
4 0
2 years ago
Find the surface area of this net.
Elden [556K]

Answer:

<h2>231cm²</h2>

Step-by-step explanation:

First, let's find the surface area of both the triangles

5x3=15

So, the surface area of the triangles is 15 sq.cm

Now, let's find the surface area of the base (large rectangle in the middle)

12x8=?

10x8=80

2x8=16

80+16=96

12x8=96

So, the surface area of the base, is 96sq.cm

Now, let's find the surface area of both of the side rectangles

12x5=60

60x2=120

So, the surface area of the two side rectangles is 120sq.cm

Now, let's find the total surface area by adding all of our answers.

120+96=216

216+15=231

<h2>So hence, the surface area of this net is 231cm²</h2>
3 0
2 years ago
Help please i’m stuck lol
liq [111]

Answer:

The answer for this is x=-5

3 0
2 years ago
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