Question

If a+ b+ c = -1 and ab + bc + ca = -4 then find the value of a square + b square + c square

Answer 1

Answer:

a²+b²+c² = 9

Step-by-step explanation:

(a+b+c)² = a²+b²+c²+2ab+2bc+2ca

(a+b+c)² = a²+b²+c²+2(ab+bc+ca)

putting the value...

(-1)² = a²+b²+c²+2(–4)

1 = a²+b²+c²– 8

1+8 = a²+b²+c²

=> a²+b²+c² = 9 Ans.

Answer 2

Answer:

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

Step-by-step explanation:

ab dusra na da hi dia answer toh ab mai deka kya karunga vesa uska answer ek dum correct hai mai bhi same hi solve karta that's why go for it.