1.

(2a – 3b + c )^2please solve this for me ​

Answer»

Step-by-step EXPLANATION:

We KNOW that,

(x+y+z)^2=x^2+y^2+z^2+2xy+2yz+2xz

Therefore,

(2a–3b+c)^2=(2a)^2+(–3b)^2+(c)^2+2(2a×–3 b)+2(–3b×c)+2(2a×c)

4a^2+9b^2+c^2+2(-6ab)+2(-3BC)+2(2AC)

4a^2+9b^2+c^2-12ab-6bc+4ac



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