Question

please tell me fast please​

Answer 1

Answer:

DO SQUARING ON BOTH SIDES FOR THE GIVEN EQUATION AND TWO SIGNS GET CANCELLED AND WRITE THEM AS REQUIRED TO PROVE THEN YOU WILL GET ANSWER.

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

We have,

$\rm \: a + 2b + c = 0$

$\rm \: \implies \: a + c = - 2b$

$\rm \: \implies \: (a + c )^{2} = (- 2b)^{2}$

$\rm \: \implies \: (a)^{2} + (c )^{2} + 2.a.c= 4(b)^{2}$

$\rm \: \implies \: a^{2} + c ^{2} + 2ac= 4b^{2}$

$\rm \: \implies \: a^{2} - 4b^{2} + c ^{2} + 2ac= 0$