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3 years ago

Factor this trinomial.

Mathematics

1 answer:

AnnZ [28]3 years ago

8 0

Answer:

factoring this trinomial of x2 + x - 2? i got you covered. it's good that this is a multiple choice question because you can work backwards. the answer is C because all you have to do is first multiply the 2 x's to make x to the power of two. then you multiply the first x with -1 to make -x. then you make 2x by multiplying the 2 with x and -2 by multiplying 2 by -1. then you combine the common factors.

Step-by-step explanation:

(x + 2)(x - 1)

(x)(x) = x2

2 x -1 = -2

x2 - x + 2x -2

x2 + x - 2

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me vazquez determines that the area of a bathroom in his house is 25 square feet less than 1/5 of the area of the living room. i

Elanso [62]

Answer:

Area of Living Room = 300 square feet

Step-by-step explanation:

According to question ,

The area of bathroom = 35 square feet

And it is mention that area of bathroom is 25 sqft less than $\frac{1}{5}$ area of living room .

Thus , as per question ,

Area of bathroom = $\frac{1}{5}$ times area of living room - 25 sqft

Or, 35 sqft = $\frac{1}{5}$ times area of living room - 25 sqft

Or, 35 sqft + 25sqft = $\frac{1}{5}$ times area of living room

Or, 60 sqft = $\frac{1}{5}$ times area of living room

∴ Area of living room = 60 × 5

Hence , Area of living room = 300 square feet .

5 0

3 years ago

If z = (5 + 12i) ÷ (3 + 4i), then |z| = _____. 5/13 1(2/3) 2(3/5) 3

Marta_Voda [28]

$\dfrac{5+12i}{3+4i}=\dfrac{5+12i}{3+4i}\cdot\dfrac{3-4i}{3-4i}=\dfrac{15-20i+36i-49i^2}{3^2-(4i)^2}\\\\=\dfrac{15+16i+49}{9-16i^2}=\dfrac{64+16i}{9+16}=\dfrac{64+16i}{25}=2.56+0.64i$

$z=a+bi\\\\|z|=\sqrt{a^2+b^2}\\\\z=2.56+0.64i\to a=2.56;\ b=0.64\\\\|z|=\sqrt{2.56^2+0.64^2}=\sqrt{6.9632}=\sqrt{\dfrac{69632}{10000}}=\sqrt{\dfrac{4096\cdot17}{100}}\\\\=\dfrac{64\sqrt{17}}{100}=0.64\sqrt{17}\approx2.6=2\dfrac{3}{5}$

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3 years ago

Read 2 more answers

I need help with my math. This problem stumps me

mash [69]

Answer:

3 = 95

4 = 85

Step-by-step explanation:

ok first of all im sorry this problem stumped you

now let go

a and b are parallel so 3 would be 95

180 - 95 = 85

3 is equal to 95

4 is equal to 85

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3 years ago

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inysia [295]

Answer:

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Step-by-step explanation:

(3x+2)/4=-7

3x+2=4×-7

3x=-28-2

3x=-30

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3 years ago

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