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lbvjy [14]
3 years ago
6

Multiply (2x - 5y)^2

Mathematics
1 answer:
yarga [219]3 years ago
3 0
(2x-5y)^2=(2x-5y)(2x-5y)\\\\=(2x)(2x)+(2x)(-5y)-(5y)(2x)-(5y)(-5y)\\\\=4x^2-10xy-10xy+25y^2=4x^2-20xy+25x^2\\\\or\ use:(a-b)^2=a^2-2ab+b^2\\\\(2x-5y)^2=(2x)^2-(2x)(5y)+(5y)^2=4x^2-10xy+25y^2
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Evaluate the following expressions using the chip method. SHOW ALL WORK!!!
Mila [183]

Answer:

  • a. -7
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Step-by-step explanation:

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  • b. In multiplication +++=+ ++-=- and a -+-=+ do your problem without thinking about the signs and then add the signs with the formula I showed you.
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5 0
3 years ago
What is 5(4x + 3.5) equivalent to?
sergejj [24]

Answer:

The answer is  

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Step-by-step explanation:

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5 x 3.5

3 0
3 years ago
What do I multiple to -1 1/7 to get 1
Setler79 [48]

Answer:

-7/8

Step-by-step explanation:

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x = -7/8

7 0
3 years ago
Help math fractions <br> 3 2/3 - 1 11/12=
Allisa [31]

Answer:

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Step-by-step explanation:

4 0
4 years ago
Read 2 more answers
Please find the slope of (-2, 4) and (3, -5)
DIA [1.3K]

Answer:

The slope of the line = m = -9/5

Step-by-step explanation:

Given the points

  • (-2, 4)
  • (3, -5)  

Determining the slope between (-2, 4) and (3, -5)

(x₁, y₁) = (-2, 4)

(x₂, y₂) = (3, -5)

Using the formula

Slope = m =  [y₂ - y₁] /  [x₂ - x₁]  

                 =  [-5 - 4] / [3 - (-2)]

                 = [-9] / [3 + 2]

                 = -9/5

Thus, the slope of the line = m = -9/5  

8 0
3 years ago
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