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Olenka [21]
3 years ago
12

HELP!!! 100 POINTS ANSWER FAST

Mathematics
2 answers:
anastassius [24]3 years ago
8 0

Answer:

(x^2-4)^2 = 9

Step-by-step explanation:

First, isolate the constant:

x^2-8x = -7

Then, since (a-b)^2 = a^2-2ab+b^2, you should add 16(4^2) to both sides:

x^2-8x+16 = 9

Now, we can rewrite the right-hand side as (a-b)^2:

(x-4)^2 = 9

Viktor [21]3 years ago
4 0

Answer:

  • (x - 4)^2 = 9

Step-by-step explanation:

<u>Completing the square</u>

  • x^2 - 8x + 7 = 0
  • x^2 - 2*4x + 16 - 9 = 0
  • (x^2 - 2*4x + 4^2) = 9
  • (x - 4)^2 = 9

<u>The blanks are</u>

  • - 4 and 9
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What is BC ?<br><br><br><br> Enter your answer in the box.<br><br> units?
White raven [17]

Answer:

The length of the BC is 25 units .

Step-by-step explanation:

As shown in the diagram

In ΔABC  

∠B = ∠C (As given)

(If the angles are equal than their opposite sides are also equal .)

Thus

AB = BC

As given

AB = 4x + 4

AC = 6x - 14

Thus

4x + 4 = 6x - 14

6x - 4x = 14 + 4

2x = 18

x = \frac{18}{2}

x = 9

Put in the

BC = 2x + 7

     = 2 × 9 + 7

     = 18 + 7

     = 25 units

Therefore the length of the BC is 25 units .



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<span>5x+10 = y

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