Question

a + b is equal to 5 a b is equal to 6 find a cube plus b cube​

Answer 1

a+b=5_______________(given)

ab=6_________________(given)

a³+b³=(a+b)(a²-ab+b²)

=(5)²+[(5)² - 6]

=25+(25-6)

=25+19

=44

Answer 2

Answer : 35

Step-by-step explanation :

Given that,

a+b =5

ab=6

We know that,

${(a + b)}^{3} = a ^{3} + {b}^{3} + 3ab(a + b)$

i.e,

$125 = {a}^{3} + {b}^{3} + 3 \times 6 \times 5$

$125 = {a}^{3} + {b}^{3} + 90$

$125 - 90 = {a}^{3} + {b}^{3}$

${a}^{3} + {b}^{3} = 35$

Hence the answer is 35