Question

plz answr it
step by step​

Answer 1

hey mate!!

here's your answer...

(it became so simple if you know the formula)

a³+b³+c³-3abc =(a+b+c)(a²+b²+c²-ab-bc-ca)

now,

a + b + c = 5

ab + bc + ca = 10

so,

(a + b + c)² = a² + b² + c² +2(ab + bc+ca)

(5)² -2×10 = a² + b² + c²

a² + b² + c² =5

so put it in formula :

a³+b³+c³-3abc=(a+b+c)[a²+b²+c²-ab-bc-ca]

=(5)[5-(10)]

=(5)(-5)

=(-25) Answer....

$<marquee>Hope it will be helpful for you ☺$