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adoni [48]
3 years ago
11

Expand and simplify : A) (x+7)(x+10). B) (X-3) (X-9)

Mathematics
1 answer:
garri49 [273]3 years ago
6 0

Answer:

Step-by-step explanation:

A) Using the foil method and distribution, you should get x²+10x+7x+70 from (X×X)+(X×10)+(X×7)+(7×10). When you combine these like terms, you get x²+17x+70.

B) Using the same ideology from part A, when you multiply x-3 into x-9. you should get x²-9x-3x+27. Simplifying this will give you x²-12x+27.

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3 years ago
What property is ased 4+5=5+4 (2+10+5=2+(10+5) 2(5+10)=10+32
goblinko [34]

Answer:

In mathematics, there are some properties of numbers that are handy to know. For example, the identity property of multiplication says that any number times one is equal to the original number. So, according to that property 5 x 1 = 5.

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4 years ago
What is 2/3 ÷ 4/5<br><br>2/3 <br>5/6<br>1 1/5<br>3 1/3​
steposvetlana [31]

Answer:

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Step-by-step explanation:

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3 years ago
Tìm căn bậc hai của số phức z=1+i√3
Anni [7]

Write <em>z</em> in polar form:

<em>z</em> = 1 + √3 <em>i</em> = 2 exp(<em>i</em> <em>π</em>/3)

Taking the square root gives two possible complex numbers,

√<em>z</em> = √2 exp(<em>i</em> (<em>π</em>/3 + 2<em>kπ</em>)/2)

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√<em>z</em> = √2 exp(<em>i</em> <em>π</em>/6) = √(3/2) + √(1/2) <em>i</em>

and

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427 Divided by three
andrew11 [14]
Is all correct answer

7 0
4 years ago
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