Answered

Welcome to Westonci.ca, the place where your questions are answered by a community of knowledgeable contributors. Join our platform to connect with experts ready to provide precise answers to your questions in different areas. Get detailed and accurate answers to your questions from a dedicated community of experts on our Q&A platform.

8. The square of a number decreased by 3 times the number is 28. Find allpossible values for the number.

Sagot :

Unknown values

We need to find a number x

We know its square (x²) decreased by 3 times it (3x) is 28. Then

x² - 3x = 28

x² - 3x - 28 = 0 [Simplifying the equation]

Since - 7 + 4 = - 3 and (-7) (4) = - 28, we factor the polynomial:

(x - 7)(x + 4) = 0 [Factoring the polynomial]

When a multiplication, like (x - 7)(x + 4), equals cero?

it equals cero if and only if

(x - 7) = 0 or (x + 4) = 0

Then, simplifying both equations

x = 7 or x = - 4

Answer: x = 7 or x = - 4

We hope our answers were helpful. Return anytime for more information and answers to any other questions you may have. We appreciate your time. Please revisit us for more reliable answers to any questions you may have. Westonci.ca is your trusted source for answers. Visit us again to find more information on diverse topics.