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3 years ago

How to factor 7z^2-4z-3

Mathematics

2 answers:

adelina 88 [10]3 years ago

8 0

Good luck I hope find you answer

Aneli [31]3 years ago

3 0

Answer= (7x - 4)(x - 3)

Work=
You’re looking for 2 numbers that add to -4 and multiply to -21.

-7 + 3 = -4
-7 x 3 = -21

So it’s (x - 4)(x - 21)

Divide both by 7, because it is attracted to the x squared.
Remember: if a number is not divisible by 7, the 7 attaches to the x

Answer= (7x - 4)(x - 3)

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Factor completely 2x^2 − 2x − 40.

zubka84 [21]

Step-by-step explanation:

Hey there!

Given;

$= 2 {x}^{2} - 2x - 40$

Solve it by using mid-term factorization.

$= 2 {x}^{2} - 2x - 40$

$= 2 {x}^{2} - (10 - 8)x - 40$

$= 2 {x}^{2} - 10x + 8x - 40$

Take common and simplify them to get answer.

$2x(x - 5) + 8(x - 5)$

$= (2x + 8)(x - 5)$

$= 2(x + 4)(x - 5)$

Therefore the answer is option D.

Hope it helps..

3 0

4 years ago

Someone please help I don’t understand what this even is.

musickatia [10]

Answer:

A and D are not polynomials. B and C are polynomials

Step-by-step explanation:

In order to find out what function is a polynomial, you have to understand what a polynomial is. A polynomial is a sum of monomials that make up a polynomial expression. A mononomial is a real number, with a variable, and a exponent of a variable that makes up one term. For example $3x^{2}$ is a monomial. It has a real number, a variable, and a exponent that makes up one term. A polynomial has one or more monomial terms that make it a polynomial. So firstly, a polynomial by definition cannot have a negative exponent. That eliminates D. Why? because by definition, the standard form of a polynomial function states that n cannot be positive, it has to be a nonnegative integer. Also, polynomials can only be real numbers. It cannot have a nonreal number. Radical forms without a perfect square are nonreal numbers. So that eliminates A. However, B and C can be polynomials because the definition of polynomials say that real numbers, nonnegative exponents, and constants can be part of a polynomial function. Even with the fraction, that would be part of rational expressions (polynomial/polynomial), which is polynomials. I hope this helps friend. Math can be tough to explain just as much as doing it :)

7 0

3 years ago

Find the real zeros. X^4-11x^2+18=0

Anon25 [30]

Answer:

Step-by-step explanation:

5 0

4 years ago

Which pair of angles are corresponding angles? 1 and 4, 2 and 3, 3 and 6, 4 and 8 Please answer ASAP

lora16 [44]

Answer:

4 and 8

Step-by-step explanation:

corresponding angles are two angles that have the same angle degree and are on the same side of the graph if you were to take the bottom part and move it up to the top part

3 0

4 years ago

Help me please please please it’s due tonight!!!!!!!!!!!

vredina [299]

Answer:

A. (4, 18)

Step-by-step explanation:

The "y" coordinate of the midpoint will be equal to the average of the y coordinates of the endpoints, and the x coordinate of the midpoint will be equal to the average of the x coordinates of the endpoints, and so we get that...

The x coordinate of the midpoint = (5 + 3) / 2 = 8 / 2 = 4

The y coordinate of the midpoint = (21 + 15) / 2 = 36 / 2 = 18

So the right answer is A (4, 18)

4 0

3 years ago