Question

Find the value of w, given that x=3, y=4, z=-2 and w= x2 – y

2 + z2 –xyz.​

Answer 1

Answer:

value of w is 18. explanation is in picture

Answer 2

w= 39

Explanation:

Given:

1.  x=3

2. y=4

3. z=-2

4. w= x²– y ²  + z²  –xyz.​

To find:

The value of w

==> To find w

==> Substitute all the values in the given equation

==> x = 3

==> x² = 9

==> y = 4

==> y² =16

==> z = -2

==> z² = 4

==> Given Equation

==> w = x²-y²+z²-xyz

==> w = 3-4+16-xyz

==> w = 15-xyz

==> w = 15-(3)(4)(-2)

==> w = 15- 12(-2)

==> w = 15 - (-24)

==> w = 15+24

==> w= 39