How would you do this, I really struggled with this last year.

Mathematics

1 answer:

Deffense [45]3 years ago

5 0

If you're multiplying a whole number by a fraction, then multiply the whole number by the numerator, then divide that number by the denominator.

So in the case of 15 x (5/6), multiply the 15 by 5 (75) and then divide by 6 to get 75/6 (as an unsimplified answer).

In the case of 3 x (3/6), you again multiply the whole number by the numerator (3x3=9) and divide by the denominator (9/6) to get 9/6 or 3/2 when simplified.

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FACTOR the following quadratic expression: x^2-3x-18. Clearly show your steps OR explain your reasoning and CHECK your answer by

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Answer:

The factors of x² - 3·x - 18, are;

(x - 6), (x + 3)

Step-by-step explanation:

The given quadratic expression is presented as follows;

x² - 3·x - 18

To factorize the given expression, we look for two numbers, which are the constant terms in the factors, such that the sum of the numbers is -3, while the product of the numbers is -18

By examination, we have the numbers -6, and 3, which gives;

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Therefore, we can write;

x² - 3·x - 18 = (x - 6) × (x + 3)

Which gives;

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