Gujarat BoardEnglish MediumSTD 9MathsAlgebraic Identities2 Marks
Question
Write the following in the expanded form:
$(a+2 b+c)^2$
✓
Answer
We have,
$(a+2 b+c)^2=a^2+(2 b)^2+c^2+2 a(2 b)+2 a c+2(2 b) c$
${\left[\therefore(x+y+z)^2=x^2+y^2+z^2+2 x y+2 y z+2 x z\right]}$
$\therefore(a+2 b+c)^2=a^2+4 b^2+c^2+4 a b+2 a c+4 b c$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.