Question

Simplify
(3x + 5y) (9x2– 15xy + 25y2)​

Answer 1

Answer:

ʜᴇʟʟᴏ ᴍᴀᴛᴇ!

( 3x + 5y )( 9x² - 15xy + 25y² )

( 3x + 5y )[(3x)² - (3x)(5y) + (5y)²]

Similar to ( a + b )( a² - ab + b² ) = a³ + b³

( 3x + 5y )[(3x)² - (3x)(5y) + (5y)²] = (3x)³ + (5y)³

27x³ + 125y³

Answer : 27x³ + 125y³

HOPE IT HELPS!

Answer 2

Answer:

Formula,

a

3

−b

3

=(a−b)(a

2

+ab+b

2

)

a

3

+b

3

=(a+b)(a

2

−ab+b

2

)

Given,

(

x

3

−

y

5

)(

x

2

9

−

xy

15

+

y

2

25

)

=(

x

3

)

3

−(

y

5

)

3

=

x

3

27

−

y

3

125