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3 years ago

Factor completely 18x2 − 21x −15.

Mathematics

2 answers:

Valentin [98]3 years ago

8 0

Answer:

The factors of equation $18x^2-21x-15$ is $=3((3x-5)(2x+1))$

Step-by-step explanation:

Given : Equation $18x^2-21x-15$

We have to factorize the given equation $18x^2-21x-15$

Consider the given equation $18x^2-21x-15$

Taking 3 common from each term, we have,

$=3\left(6x^2-7x-5\right)$

We will solve the given equation using middle term split method,

-7x can be written as 3x -10x

Equation becomes,

$=3(6x^2+3x-10x-5)$

Taking 3x common from first two term and -5 common from last two terms, we have,

$=3(3x(2x+1)-5(2x+1))$

Taking (2x+1) common, we have,

$=3((3x-5)(2x+1))$

Thus, The factors of equation $18x^2-21x-15$ is $=3((3x-5)(2x+1))$

alexdok [17]3 years ago

4 0

3(6x² + 3x - 10x - 5)
= 3(3x(2x + 1) - 5(2x + 1))
= 3(2x + 1)(3x - 5)

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Answer:

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Step-by-step explanation:

Because the coefficient is not greater than 1, you can simply solve the problem without the quadratic formula.

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3 years ago

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1 year ago

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ollegr [7]

Answer:

positive

Step-by-step explanation:

the discriminant of the function is postive.

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a purse contains 25p coins and 50 p coins. the total amount in the purse is rs.25. if the number of 50 p coins is double the num

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Let the total no. of 25 p coins be x
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3 years ago

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Answer:

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Step-by-step explanation:

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6 0

2 years ago

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