Question

x^3y-8y^2 factorise it please​

Answer 1

${x}^{3} y - 8 {y}^{2}$

$8 {x}^{3} y$

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Answer 2

Answer:

3y

2

+8y+5=0

This equation comparing with ay

2

+by+c=0, we get

a=3,b=8,c=5

∴y=

2a

−b±

b

2

−4ac

⇒y=

2×3

−8±

64−4×3×5

⇒y=

6

−8±

64−60

⇒y=

6

−8±2

Taking

′

+

′

sign, we get

thereforey=

6

−8+2

=

6

−6

=−1

Taking

′

−

′

sign, we get

∴y=

6

−8−2

=

6

−10

=

3

−5

∴y=−1

or y=−

3

5

I hope it will help you

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