Solving quadratic equation using the completing the square (a).9k²+5k=2

Mathematics

1 answer:

Leto [7]3 years ago

6 0

Step-by-step explanation:

everything can be found in the picture

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For this case, the first thing we must do is define a variable.
We have then:
p: rate in miles per hour for the last 1.5 hours
We now write the equation that models the problem.
We have then:
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Rewriting we have:
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From here, we clear the value of p.
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Write the product in descending powers of x. (x2 + 3x + 1)(x2 + x + 2)

Novay_Z [31]

Multiply each term in one bracket by each in the other:

(I assume x2 means x^2 / x squared) 

(x^2 + 3x + 1)(x^2 + x + 2) 

= x^4 + x^3 + 2x^2 + 3x^3 + 3x^2 + 6x + x^2 + x +2 

Now collect all terms: 

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3 years ago

−2y 3 +3y−3y+7y 3 +1+2−5

Xelga [282]

Answer:

15y-2

Step-by-step explanation:

Please use parentheses if needed, this has me confused but without them, I solved it.

(-2y)(3)+3y-3y+7y(3)+1+2+5

-6y+3y+-3y+21y+1+2+-5

Combine like terms

(-6y+3y+-3+21y) + (1+2+-5)

15y + -2

Answer again: 15y - 2.

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4 years ago

Solving quadratic equation using the completing the square (a).9k²+5k=2​

Solving quadratic equation using the completing the square (a).9k²+5k=2