Substitution 𝒒𝟐 + 𝒓𝒑 + 𝒓+ 𝟒 −𝒒 𝒑 For 𝑝 = 3, 𝑞 = −4 and 𝑟 = 7 Sub in values for 𝑝, 𝑞 and r (−4) 2+(7)(3) + 7+ 4 − −4 3 = 6