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English 15 Public

Equations, Inequalities, and Mathematical Modeling

Study Slideshow

Find the x-intercepts of the function. f(x) = x^2 - 64

x = 8 and x = -8

Test the equation for symmetry. (x-axis, y-axis, and origin) y = -x^4+4x^2+5

only y-axis symmetry

Solve the equation.

8/3 = 2.7

Solve the quadratic using any method.

r = 7 and r = -3

Solve by COMPLETING THE SQUARE.

n = -1 + sqrt(67) n = -1 - sqrt(67)

Solve the equation. Check for extraneous solutions.

n = 2

Solve.

x = 26 and x = -10

Simplify.

-4-2i

Simplify.

(30/149) - (21/149)i

Solve the inequality. Write your answer in INTERVAL NOTATION.

(-inf, 0] U {2, inf)

Solve the inequality. Write your answer in INTERVAL NOTATION.

[-15, 9]

Solve the inequality. Write your answer in interval notation. x^2 - 6x + 9 < 16

(-1, 7)

Solve the inequality. Write your answer in interval notation.

(-inf, 3) U[7, inf)

Use the information provided to write the standard form of the equation of the circle.

(x - 5)^2 + (y - 9)^2 = 18

Simplify.

-54isqrt(2)