3 years ago

Factorise the followingx^2+2x-8

Mathematics

1 answer:

ioda3 years ago

7 0

Answer:

${x}^{2} + 2x - 8 \\ {x}^{2} + 4x - 2x - 8 \\ x(x + 4) - 2(x + 4) \\ = (x + 4)(x - 2)$

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3 years ago

4. (10 points) From the given triangle:

katrin2010 [14]

Answer:

sinθ = y/r sinθ = $\frac{-6}{10} = \frac{-3}{5}$

cosθ = x/r cosθ = $\frac{8}{10} = \frac{4}{5}$

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cscθ = r/y cscθ = $\frac{-5}{3}$

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explanation:

r = $\sqrt{(8)^{2}+(-6)^{2} }$

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3 years ago

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3 years ago

Use the quadratic formula to solve x^2-6x=-7. Show your work. Then describe the solution.

s2008m [1.1K]

Answer: The solutions are x = 3+sqrt(2), and x = 3-sqrt(2). The quadratic equation has two solutions because it has a positive discriminant.

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1 year ago

Factorise the followingx^2+2x-8​

Factorise the followingx^2+2x-8