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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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3 years ago

T is the midpoint of KL. K has coordinates (2,−6), and T has coordinates (−4,2). Identify the coordinates of L.

kotykmax [81]

Answer:

$L = (-10,10)$

Step-by-step explanation:

Given

$K = (2,-6)$

$T = (-4,2)$

Required

Determine the coordinates of L

Since T is the midpoint of K and L, we make use of:

$T_x = \frac{K_x + L_x}{2}$

and

$T_y = \frac{K_y + L_y}{2}$

Solving for $L_x$

$T_x = \frac{K_x + L_x}{2}$

$-4 = \frac{2 + L_x}{2}$

Multiply through by 2

$-8 = 2 + L_x$

$L_x = -8 - 2$

$L_x = -10$

Solving for $L_y$

$T_y = \frac{K_y + L_y}{2}$

$2 = \frac{-6+L_y}{2}$

Multiply through by 2

$4 = -6 + L_y$

$L_y = 4 + 6$

$L_y = 10$

Hence: The coordinates of L is:

$L = (-10,10)$

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3 years ago

In circle P, diameter QS measures 20 centimeters

velikii [3]

The answer is 19.9 centimeters. Hope this helps!!!

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3 years ago

How to factor 25x^2 - 81= 0

dalvyx [7]

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anwser= (5x-9)(5x+9)

the reason this works is because when you foil you get
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3 years ago

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Step-by-step explanation:

x=28°

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3 years ago