Additional Mathematics 0606 / Quadratic functions / 2.82.8: Completing the square and a related minimum0606/22/M/J/19 — Question 5 · 5 marksMark as done · Save for later · Show all solutions(i)Express 5x2−15x+15x^{2} - 15x + 15x2−15x+1 in the form p(x+q)2+rp(x + q)^{2} + rp(x+q)2+r, where ppp, qqq and rrr are constants.[3]▸ Answer(ii)Hence state the least value of x2−3x+0.2x^{2} - 3x + 0.2x2−3x+0.2 and the value of xxx at which this occurs.[2]▸ Answer▸ Official mark scheme← 2.7: Real and distinct roots1.3: Completing the square and a modulus graph →
