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ex.5.2 2 e

Exercise 5.2 — Question 2(e) Simplify: \[ (x+y+z)^2+ \left(x+\frac{y}{2}+\frac{z}{3}\right)^2- \left(\frac{x}{2}+\frac{y}{3}+\frac{z}{4}\right)^2 \] Solution We use the identity: \[ (a+b+c)^2=a^2+b^2+c^2+2ab+2bc+2ca \] Step […]

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