Maths Tricks You Must Know | Fastest Calculation Methods

Integer numbers 1️⃣8️⃣5️⃣⏳📝📚 #student #math #mathematics #studytok #foryou

One Thousand and One | Numberblocks COURSE - Level 5, Blue (S4 E29)

Q) Show that 𝑓:𝑅_+→[−5,∞) given by 𝑓(𝑥)=4𝑥^2+4𝑥−5 is both one-one and onto where 𝑅_+=[0,∞).