Question

6 z square + 38 Z + 60​

Answer 1

Answer:

-17

Step-by-step explanation:

x+y+z=4 and x

2

+y

2

+z

2

=50

We know,

(a+b+c)

2

=(a

2

+b

2

+c

2

)+2(ab+bc+ca)

Here,

a=x,b=y,c=−z

Thus,

(x+y−z)

2

=x

2

+y

2

+z

2

+2(xy−yz−xz)

=>4

2

=50+2(xy−yz−xz)

=>

2

16−50

=(xy−yz−xz)

=>(xy−yz−xz)=−17