Question

find the value of 4x^2+y^2+25z^2-10yz-20zx when x=4,y=3andz=2

Answer 1

Hey Mate ✌

Here's your answer friend,

4x² + y² + 25z² - 10yz - 20zx

==> Therefore,

By substituting x = 4, y = 3 and z = 2

we get,

4(4)² + (3)² + 25(2)² - 10(3)(2) - 20(2)(4)

==> 64 + 9 + 100 - 60 - 160

==> ( - 47 ) is the required answer.

⭐ Hope it helps you ^_^ ⭐