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Varvara68 [4.7K]
3 years ago
7

Complete the square to transform the quadratic equation into the form (x – p)2 = q.

Mathematics
1 answer:
Lubov Fominskaja [6]3 years ago
5 0
X^2 - 6x - 8 = 6
x^2 - 6x =  14
(x - 3)^2 - 9 = 14
(x - 3)^2 = 23
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Roy is twice as old as Joan, and in 3 years the sum of their ages will be 21 years. Find their present ages.
Lisa [10]

Answer:

Roy is 10 years old at present and Joan is 5 years old at present

Step-by-step explanation:

Let

x----> Roy's age

y----> Joan's age

we know that

x=2y ----> equation A

(x+3)+(y+3)=21 ----> equation B

substitute equation A in equation B

(2y+3)+(y+3)=21

solve for y

3y+6=21

3y=21-6

3y=15

y=5 years

Find the value of x

x=2y  ----> x=2(5)=10 years

therefore

Roy is 10 years old at present

Joan is 5 years old at present

8 0
3 years ago
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Artyom0805 [142]

Answer:

The answer is C, or 3/5.

8 0
3 years ago
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Hope I Helped :)
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