Math, asked by bahbah, 1 year ago

find the following. (2x-5y-7z) ^2

Answers

Answered by thogilan

4x^2+25y^2+49z^2-20xy+70zy-28zx.

Answered by Nitesh09

(2x-5y-7z)^2

(2x)^2 + (5y)^2 + (7z)^2 - 2x*5y - 2x*7z + 5y*7z

4x^2 + 25y^2 + 49z^2 -10xy - 14xz + 35yz

Nitesh09: yeah....by mistake....that's why I answered again

thogilan: fine

bahbah: and this one (1/2 a-1/4b+2)^2

Nitesh09: 0.5a - 0.25c + 2)^2

Nitesh09: sorry brother...I want to go done for next line and I press enter but I commented....

Nitesh09: wait I am solving

thogilan: wait bro

thogilan: 1/4a^2-1/16b^2+4+2a-1/4ab

thogilan: which is ur native

Nitesh09: (0.5a - 0.25c + 2)^2
(0.5a)^2 - (0.25c)^2 + 2^2 - 2* 0.5a*0.25c - 2* 0.25c*2 + 2*0.5a*2
.25a^2 -.0625c^2 + 4 - .250ac - 1.00c + 2.0a
.25a^2 -.0625c^2 + 4 - .25ac - c + 2a

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