factorise 27 y cube
+125 z cube
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Answer:
(3y + 5z)( 9y² - 15yz + 25z²)
Step-by-step explanation:
Formula to be used
=> a³ + b³ = (a+b)(a² - ab + b²)
Now.......
=> 27y³ + 125z³
= (3y)³ + (5z)³
= (3y+5z){(3y)² -(3y)(5z) +(5z)²}
= (3y + 5z)( 9y² - 15yz + 25z²)
_____Answer_____
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