NCERT Ex 2.4 Q4 - Polynomials
Question: Expand each of the following, using suitable identities: (i) (x + 2y + 4z)^2 (ii) (2x - y + z)^2 (iii) (-2x + 3y + 2z)^2 (iv) (3a - 7b - c)^2 (v) (-2x + 5y - 3z)^2 (vi) (1/4 a - 1/2 b + 1)^2
Answer: (i) x^2+4y^2+16z^2+4xy+16yz+8xz, (ii) 4x^2+y^2+z^2-4xy-2yz+4xz, (iii) 4x^2+9y^2+4z^2-12xy+12yz-8xz, (iv) 9a^2+49b^2+c^2-42ab+14bc-6ac, (v) 4x^2+25y^2+9z^2-20xy-30yz+12xz, (vi) 1/16 a^2+1/4 b^2+1-1/...
Full step-by-step NCERT solution with diagrams on Something by Zero.