2 years ago

X^2+5*x^3+7 Solve pls lol

Mathematics

2 answers:

bija089 [108]2 years ago

8 0

Answer:

5x^3+x^2+7

Step-by-step explanation:

sweet [91]2 years ago

3 0

don't know sorry

Step-by-step explanation:

sorry very very school

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SashulF [63]

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${r}^{2} = 4 \cos2\theta$

EXPLANATION

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${( {x}^{2} + {y}^{2} )}^{2} = 4( {x}^{2} - {y}^{2} )$

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$y = r \sin( \theta)$

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This implies that

${( {r}^{2} )}^{2} = 4(( { r \cos\theta) }^{2} - {(r \sin\theta) }^{2} )$

Let us evaluate the exponents to get:

${r}^{4} = 4({ {r}^{2} \cos^{2}\theta } - {r}^{2} \sin^{2}\theta)$

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Divide through by r²

${r}^{2} = 4 ({ \cos^{2}\theta } - \sin^{2}\theta)$

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