7. If f(x) = x+3 and g(x) = x2 + 8x + 15. y = f(x)* g(x) a. y = x² + 11x +39 b. y = с. у = y d. x3 +11x2 + 39x+45 2x3 + 11x² + 42x+2 = x² - 3x-51 8. Let u(x) = x + 3 and v(x) = x² - 9. For which value(s) of x is y a. x = 3 b. x = 9 C. x = -3 d. x = 3 and x = -3 u(x) = undefined? v(x)

7. If f(x) = x+3 and g(x) = x2 + 8x + 15. y = f(x)* g(x) a. y = x² + 11x +39 b. y = с. у = y d. x3 +11x2 + 39x+45 2x3 + 11x² + 42x+2 = x² - 3x-51 8. Let u(x) = x + 3 and v(x) = x² - 9. For which value(s) of x is y a. x = 3 b. x = 9 C. x = -3 d. x = 3 and x = -3 u(x) = undefined? v(x)

Algebra and Trigonometry (MindTap Course List)

4th Edition

ISBN:9781305071742

Author:James Stewart, Lothar Redlin, Saleem Watson

Publisher:James Stewart, Lothar Redlin, Saleem Watson

Chapter0: Are You Ready For This Course?

Section0.B: Diagnostic Test: Algebraic Expressions

Problem 1DT

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Question

Please help on all asked questions. Please show all work and steps. Please circle the final answer.

7. If f(x) = x+3 and g(x) = x2 + 8x + 15. y = f(x)* g(x)
a. y = x² + 11x +39
b. y =
с. у
=
y
d.
x3 +11x2 + 39x+45
2x3 + 11x² + 42x+2
= x² - 3x-51
8. Let u(x) = x + 3 and v(x) = x² - 9. For which value(s) of x is y
a. x = 3
b. x = 9
C. x = -3
d. x = 3 and x = -3
u(x)
=
undefined?
v(x)

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