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Jet001 [13]
3 years ago
7

Factorize : a2 + b2 _ 2(ab - ac + bc ).

Mathematics
1 answer:
ruslelena [56]3 years ago
7 0
(a² + b² - 2ab)  + 2ac - 2bc = (a - b)² + 2c(a-b) = (a-b)(a-b +2c)
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What strategies do you use when solving for an unknown number​
frez [133]

Answer:

adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

Step-by-step explanation:

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5 0
2 years ago
What is x in this geometry equation?​
lesya [120]

Answer:

x = 7

Step-by-step explanation:

m\overset{\frown} {PQ} = m\overset{\frown} {MN}... (given) \\\therefore Chord \:PQ \cong Chord\: MN\\  \therefore \: 4x + 10 = 38 \\   \therefore \: 4x= 38  - 10\\ \therefore \: 4x= 28\\  \therefore \: x=  \frac{28}{4} \\   \huge \red{ \boxed{\therefore \: x= 7}}

8 0
3 years ago
Find two consecutive odd integers whose product is 99
Illusion [34]
Let x be the first odd number.

Second odd number will be x+2

Proof:

If 3 (was) the first odd number, 3+2 would be the next which is 5.

So,

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xsquare + 2x = 99
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8 0
3 years ago
Hi! ❤️ I’m looking for help here thanks.
abruzzese [7]

Answer:

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Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
A multiple-choice standard test contains total of 25 questions, each with four answers. Assume that a student just guesses on ea
weqwewe [10]

Answer:

a)  8*88*10⁻⁶ ( 0.00088 %)

b) 0.2137 (21.37%)

Step-by-step explanation:

if the test contains 25 questions and each questions is independent of the others, then the random variable X= answer "x" questions correctly , has a binomial probability distribution. Then

P(X=x)= n!/((n-x)!*x!)*p^x*(1-p)^(n-x)

where

n= total number of questions= 25

p= probability of getting a question right = 1/4

then

a) P(x=n) = p^n = (1/4)²⁵ = 8*88*10⁻⁶ ( 0.00088 %)

b) P(x<5)= F(5)

where F(x) is the cumulative binomial probability distribution- Then from tables

P(x<5)= F(5)= 0.2137 (21.37%)

7 0
3 years ago
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