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2 years ago

Which of the following are solutions to the equation below?

Mathematics

2 answers:

Reptile [31]2 years ago

7 0

Answer:

Option B and D

Step-by-step explanation:

Subtract 9 from both sides :

4x² + 4x - 8 = 0

Divide both sides by 4 :

x² + x - 2 = 0

Factorise using factorisation method :

x² - x + 2x -2 = 0

x(x - 1) +2(x-1) = 0

(x+2)(x-1) = 0

Solve for x

x +2 = 0 OR x - 1 = 0

x = -2 OR x = 1

Answer will be Option B and D

Hope this helped and have a good day

kakasveta [241]2 years ago

7 0

Answer:

option b. –2 and d. 1 are correct.

*For detailed explanation refer to the attachment

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Answer:

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Step-by-step explanation:

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So, we note that a=16, b=-200, and c=350.

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$t_1=\frac{200-\sqrt{200^2-4*16*350} }{2*16}=2.10$

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