Question

If x - y=5 and xy = 7, find the value of x^3- y^3​

Answer 1

Step-by-step explanation:

x3-y^3=(x-y)^3+3xy(x-y)

=5^3 +3(7)(5)

=5(25+21)

=5(46)

=230

Note:(x-y)^3=x^3-y^3-3xy(x-y)