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astraxan [27]
1 year ago
7

Find the product of (x − 5)2. (1 point) Group of answer choices x2 + 10x + 25 x2 − 10x + 25 x2 − 25 x2 + 25

Mathematics
1 answer:
Anuta_ua [19.1K]1 year ago
7 0

Answer:

x^2 - 10x + 25

Step-by-step explanation:

Hello!

Expand the square using the Distributive Property.

<h3>Expand</h3>
  • (x - 5)^2
  • (x - 5)(x-5)

Distributive x - 5 to each factor

  • x(x - 5) -5 (x - 5)
  • x^2 - 5x - 5x+25
  • x^2 - 10x + 25

The answer is x^2 - 10x + 25.

We can also use a special binomial product formula.

Formula: (a - b)^2 = a^2 - 2ab + b^2

  • (x - 5)^2 = x^2 - 2(x)(5) + 5^2
  • (x - 5)^2 = x^2 - 10x + 25

We get the same answer both ways.

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The hypotenuse of the right triangle is 5y inches long. The lengths of the legs are x + 8 and x + 3 inches. If the perimeter of
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Answer: 35 inches.

Step-by-step explanation:

We know that:

hypotenuse = 5*y in

cathetus 1 = (x + 8) in

cathetus 2 = (x + 3) in

The perimeter of the triangle is 76 inches, then:

5*y + (x + 8) + (x + 3) = 76

5*y + 2*x + 13 = 76

We also know that the length of the hypotenuse minus the length of the shorter leg is 17 in.

The shorter leg is x + 3, then:

5*y - (x + 3) = 17

Then we have the equations:

5*y + 2*x + 11 = 76

5*y - (x + 3) = 17

With only these two we can solve the system, first we need to isolate one of the variables in one of the equations, i will isolate x in the second equation.

x = 5*y  - 3 - 17 = 5*y - 20

x = 5*y - 20

Now we can replace this in the other equation, we get:

5*y + 2*x + 11 = 76

5*y + 2*(5*y - 20) + 11 = 76

15*y - 40 + 13 = 76

15*y - 29 = 76

15*y = 76 + 29 = 105

and remember that the hypotenuse is equal to 5*y, then we want to get:

3*(5*y) = 105

5*y = 105/3 = 35

5*y = 35

Then te length of the hypotenuse is 35 inches.

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Answer:

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Step-by-step explanation:

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