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3 years ago

5

Find hcf of y-b,y²-b² and y²-2yb+b²

1 answer:

Mrac [35]3 years ago

8 0

Answer:

your answer will be y-b because it is common in all the expression

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Using Cramer's rule to solve linear systems.

Rzqust [24]

Answer: Last Option

$x=2,\ y=-5$

Step-by-step explanation:

Cramer's rule says that given a system of equations of two variables x and y then:

$x =\frac{Det(A_X)}{Det(A)}$

$y =\frac{Det(A_Y)}{Det(A)}$

For this problem we know that:

$Det(A) = |A|=\left|\begin{array}{ccc}4&-6\\8&-2\\\end{array}\right|$

Solving we have:

$|A|= 4*(-2) -(-6)*8\\\\|A|=40$

$Det(A_X) = |A_X|=\left|\begin{array}{ccc}38&-6\\26&-2\\\end{array}\right|$

Solving we have:

$|A_X|=38*(-2) - (-6)*26\\\\|A_X|=80$

$Det(A_Y) = |A_Y|=\left|\begin{array}{ccc}4&38\\8&26\\\end{array}\right|$

Solving we have:

$|A_Y|=4*(26) - (38)*8\\\\|A_Y|=-200$

Finally

$x =\frac{|A_X|}{|A|} = \frac{80}{40}\\\\x=2$

$y =\frac{|A_Y|}{|A|} = \frac{-200}{40}\\\\y=-5$

4 0

2 years ago

W divide 3+6 = 2 I need help I don’t know how to get the answer

tatuchka [14]

Assignment: $\bold{Solve \ Equation: \ \frac{w}{3+6}=2\quad }$

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Answer: $\boxed{\bold{w=18}}$

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Explanation: $\downarrow\downarrow\downarrow$

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Note: $\bold{Fraction \ Bar \ "/" \ = \ \div}$

[ Step One ] Multiply Both Sides By 9

$\bold{\frac{9w}{3+6}=2\cdot \:9}$

[ Step Two ] Simplify

$\bold{w=18}$

<><><><><><><>

$\bold{\rightarrow Mordancy \leftarrow}$

6 0

3 years ago

(a + b - c )(a + b + c )

True [87]

If you are looking for the expanded version, this is it. It is also possible to group either an a from (a^2 + 2b) or a b from (2ab + b^2). Hope this helps!

6 0

3 years ago

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Factor completely 5x2 − 5x − 100.

Rama09 [41]

First, factor out 5:
5 (x² -x -20)
We need two numbers that add to -1 and multiply to -20. -5 and 4 satisfy this.
5(x-5)(x+4)

4 0

3 years ago

Describe how to use a tens fact to find the difference for 15-8

scoundrel [369]

Because you need to subtract from 10, you need to do 10-8. Then you will add 5 since you took away 5 to subtract from 10.

8 0

2 years ago

Read 2 more answers