Question

if a=-2, b=-3 and c=4, find the value of:
1)
${a}^{2} + {b}^{2} + {c}^{2} - ab - bc - ca$
2)
$\frac{(a + b + c {)}^{3} }{ {a}^{2} + {b}^{2} + {c}^{2} }$
3)
$\frac{ {a}^{2} + {b}^{2} - {c}^{2} }{ab + bc - ca}$
​

Answer 1

Step-by-step explanation:

1=4+9+16-(6-12-8)

29-(-14)=29+14=43