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2 years ago

Witch expression is the factorization of x2+10x+21

Mathematics

1 answer:

Alenkasestr [34]2 years ago

6 0

Answer:

x^2 +x(7+3) +21

x^2 +7x + 3x +21

x(x+7) +3(x+7)

(x+7) (x+3)

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Consumer Math work. Please help

Firdavs [7]

Answer:

$337.5

Step-by-step explanation:

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2 years ago

What is the value of x?

Helen [10]

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2 years ago

This is a rhombus. Solve for x, Then label each angle with its correct measures:

patriot [66]

Answer:

Step-by-step explanation:

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1 year ago

Limited time . 10 points

AfilCa [17]

Answer:

Therefore the value of x is

$x=1\pm\sqrt{19}i$

Step-by-step explanation:

Given:

$x^{2}+20=2x$ which is

$x^{2}-2x+20=0$

To Find:

x = ? using Quadratic Formula

Solution:

For a Quadratic Equation ax² + bx + c = 0 , Formula Method is given as

$x=\dfrac{-b\pm\sqrt{b^{2}-4ac}}{2a}$

On Comparing with above we get

$a=1\\b=-2\\c=20$

Substituting a , b , c in Formula method we get

$x=\dfrac{-(-2)\pm\sqrt{(-2)^{2}-4(1)(20)}}{2\times 1}\\\\x=\dfrac{2\pm\sqrt{-76}}{2}\\\\x=\dfrac{2\pm2\sqrt{19}i}{2}\\Dividing\ by\ 2\ we\ get\\\\x=1 \pm\sqrt{19}i$

Therefore the value of x is

$x=1\pm\sqrt{19}i$

8 0

2 years ago

I don't understand this.

sladkih [1.3K]

You mean the word or number

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2 years ago