Question

Expand (3x - 7y - z)^2

please Solve this asap
​

Answer 1

Step-by-step explanation:

(3×3n-7×7y-z×z)

=9n-49y-z^2

Answer 2

Answer:

The formula of (a-b-c)^2 is

(a-b-c)^2= a^2+b^2+c^2-2ab+2bc-2ac

(3x-7y-z)^2=(3x)^2+(7y)^2+(z)^2-2(3x)(7y)+2(7y)(z)-2(3x)(z)

=9x^2+49y^2+z^2-42xy+14yz-6xz

Hope it helps you.

Mark me as the brainliest!