3 years ago

I will give brainlest please explain and answer

Mathematics

1 answer:

OLga [1]3 years ago

8 0

Answer: the answer is D.

Step-by-step explanation:

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(I) x²-8x = -16 (ii) x²+2x+1 = 0 (iii) 4x²-24x-36=0 Solve please...........

algol13

(I)

Given equation is x²-8x = -16

⇛ x²-8x+16 = 0

⇛ x²-4x-4x+16 = 0

⇛ x(x-4)-4(x-4) = 0

⇛ (x-4)(x-4) = 0

⇛ x-4 = 0 or x-4 = 0

⇛ x = 4 or x = 4

(ii)

Given equation is x²+2x+1 = 0

⇛ x²+x+x+1 = 0

⇛ x(x+1)+1(x+1) = 0

⇛ (x+1)(x+1) = 0

⇛ x+1 = 0 or x+1 = 0

⇛ x = -1 or x = -1

(iii)

Given equation is 4x²-24x-36 = 0

⇛ 4(x²-6x-9) = 0

⇛ x²-6x-9 = 0

⇛ x²-2(x)(3) = 9

On adding 3² both sides then

⇛ x²-2(3)x)+3² = 9+9

⇛ (x-3)² = 18

⇛ (x-3) = ±√18

⇛ x-3 = ±√(2×9)

⇛ x-3 = ±3√2

⇛ x = 3±3√2

⇛ x = 3+3√2 or 3-3√2

5 0

3 years ago

Extra points and top BRAINIEST!!! An is parallel to DE in the map below

Margaret [11]

Answer:

Third option

Step-by-step explanation:

$\frac{9}{6} = \frac{15}{x} \\$

is the correct answer.

6 0

3 years ago

Read 2 more answers

Y = –3x – 5 help I don’t know the answer

ankoles [38]

Answer:

slope: -3

y-int: (0,-5)

hope this helps!!:)

Step-by-step explanation:

7 0

2 years ago

Look at this equation 3(x+1)=3x=? which number can be placed in the box *the question mark* that would create an equation that h

KATRIN_1 [288]

The answer to this is 0

8 0

3 years ago

Suppose cos(π/2−x) =3/5, cos x =4/5 find sin, tan, csc, sec, cot

Pani-rosa [81]

Cos (π/2 - x) = sin x = 3/5
tan x = sin x / cos x = 3/5 / 4/5 = 3/4
csc x = 1/sin x = 1 / 3/5 = 5/3
sec x = 1/cos x = 1 / 4/5 = 5/4
cot x = 1/tan x = 1 / 3/4 = 4/3.

5 0

3 years ago