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3 years ago

A^2-b^2+4b-4 please solve it step by step i will mark you brainlest

Mathematics

1 answer:

alex41 [277]3 years ago

3 0

Answer:

b = a + 2 or b = 2 - a

Step-by-step explanation:

Solve for b:

-4 + a^2 + 4 b - b^2 = 0

The left hand side factors into a product with two terms:

(2 + a - b) (-2 + a + b) = 0

Split into two equations:

2 + a - b = 0 or -2 + a + b = 0

Subtract a + 2 from both sides:

-b = -a - 2 or -2 + a + b = 0

Multiply both sides by -1:

b = a + 2 or -2 + a + b = 0

Subtract a - 2 from both sides:

Answer:

b = a + 2 or b = 2 - a

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2 years ago

Write the first four terms of the sequence. rule start at 5 1/2, add 1 1/5

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$5\frac{1}{2},6\frac{7}{10},7\frac{9}{10},9\frac{1}{10}$

Step-by-step explanation:

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The first four terms are

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3 years ago

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3 years ago

Whay percent of 25 is 12?

Tcecarenko [31]

Answer:

48% of 25 is 12.

Step-by-step explanation:

To find : what percent of 25 is 12?

Solution : Let x be the percentage of 25 which is 12

So, by the statement

x% of 25 = 12

Now, we have to calculate the value of x

Step 1- Write the expression

$\frac{x}{100} \times 25 = 12$

Step 2- divide 25 by 100

$\frac{x}{4} = 12$

Step 3- Cross multiply

$x=48$

Therefore, 48% of 25 is 12.

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3 years ago