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3 years ago

Expand and combine like terms. (4b^2+ 3) (4b^2- 3) = 1 SEE ANSWER

Mathematics

1 answer:

krok68 [10]3 years ago

8 0

Answer:

Step-by-step explanation:

(4b^2+3)(4b^2-3)

since it is the expanded form of formula a^2-b^2=(a+b)(a-b) we can write,

=(4b^2)^2-(3)^3

=16b^4-9

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Question 7 of 33

astraxan [27]

Answer:

90°.

Step-by-step explanation:

When two straight lines intersects obliquely then there will be two angle of intersection, one angle is acute and the other one is obtuse.

But, here the two straight lines AB and xy intersects perpendicularly and AB bisects xy.

Therefore, the two angle of intersection are 90° each.

Hence, the angle of intersection in our case will be equal to 90°. (Answer)

7 0

4 years ago

Select one of the factors of x3y2 8xy2 − 5x2 − 40. (xy2 5) (x2 4) (xy2 − 5) (x2 − 8) 4. select one of the factors of 5x2 7x 2. (

umka2103 [35]

The <em><u>correct answers</u></em> are:

(xy² − 5); none of the above; and (4x − 3)

Explanation:

To factor the first one, we will use factoring by grouping. First group the first two together and the second two together:

(x³y²+8xy²)+(-5x²-40)

Find the GCF of each group. The GCF of the first one is xy² and the GCF of the second is -5. Factor these out of each group:

xy²(x²+8)-5(x²+8)

We now have a GCF of the terms as we have rewritten them. Factoring out (x²+8), we have:

(x²+8)(xy²-5)

To factor the second question, we want factors of 10 that sum to 7. 5 and 2 work for this, so this is how we will split up the x term in our polynomial:

5x²+5x+2x+2

Group together the first two and the last two:

(5x²+5x)+(2x+2)

Find the GCF of each group. The first one has a GCF of 5x and the second has a GCF of 2. Factor these out:

5x(x+1)+2(x+1)

The GCF of the rewritten terms is (x+1). Factoring this out, we have

(x+1)(5x+2)

To factor the third question, we want factors of -24 that sum to 5. -3 and 8 will do this, and this is how we will split up the x term:

4x²+8x-3x-6

Group together the first two and the last two:

(4x²+8x)+(-3x-6)

Find the GCF of each group. The GCF of the first group is 4x and the GCF of the second group is -3. Factor these out:

4x(x+2)-3(x+2)

The GCF of the rewritten polynomial is (x+2). Factor this out:

(x+2)(4x-3)

4 0

3 years ago

Read 2 more answers

HELP PLLZZZZZZZZZZZZZZZZZZZ

Alex17521 [72]

18 1/4 pieces she will have now
:)

3 0

3 years ago

A.) a. HL; b. CPCTC

Luda [366]

A IS THE CORRECT ANSWER, IM PRETTY SURE.

4 0

4 years ago

Find geometric mean of 4 and 12?

Law Incorporation [45]

The geometric mean is different than algebraic mean - algebraic is adding up all the numbers and dividing it by the number of numbers, but geometric is multiplying them and getting the root of the product of all the numbers. For example, if there were 10 numbers, we would have the 10th root of the product of all the numbers or the product to the power of 1/10.

Since there are 2 numbers, we simply have the square root - $\sqrt{4*12} =2* \sqrt{12} = 4* \sqrt{3}$ due to that 2²=4, so we can divide what is in the square root by that and take the 2 out.
Feel free to ask further questions

4 0

3 years ago