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Mamont248 [21]
3 years ago
11

Rewrite the function by completing the square F(x)=2x^2+3x-2

Mathematics
2 answers:
Lady bird [3.3K]3 years ago
6 0

y = 2 ( x + 3/4 )^2 − 25 8

siniylev [52]3 years ago
5 0

Answer:

\boxed{ \ 2(x+\dfrac{3}{4})^2-\dfrac{25}{8}\ }

Step-by-step explanation:

we should write this function

2x^2+3x-2

this way a(x-b)^2+c

let s check the first terms inx^2 and x

2x^2+3x

this is the beginning of

    2(x+\dfrac{3}{4})^2

indeed

   2(x+\dfrac{3}{4})^2=2x^2+3x+2(\dfrac{3}{4})^2=2x^2+3x+\dfrac{9}{8}

so we can write that

   2x^2+3x=2(x+\dfrac{3}{4})^2-\dfrac{9}{8}

then

   2x^2+3x-2=2(x+\dfrac{3}{4})^2-\dfrac{9}{8}-2=2(x+\dfrac{3}{4})^2-\dfrac{9+16}{8}=2(x+\dfrac{3}{4})^2-\dfrac{25}{8}

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