Question

If x=2, 4= 3 and z=-5

Answer 1

Question:

If x = 2, y = 3 and z = -5, then x^2 + y^2 +2z = ?

Answer:

$x^2 + y^2 +2z =3$

Explanation:

Given

$x = 2$

$y = 3$

$z = -5$

Required

Determine $x^2 + y^2 +2z =$

$x^2 + y^2 +2z =$

Substitute values for x, y and z in the above expression:

$x^2 + y^2 +2z =2^2 + 3^2 + 2(-5)$

$x^2 + y^2 +2z =2^2 + 3^2 - 2*5$

$x^2 + y^2 +2z =4 + 9 - 2*5$

$x^2 + y^2 +2z =4 + 9 - 10$

$x^2 + y^2 +2z =3$