Q2 of 227 Page 105

Solve the following quadratic equations using quadratic formula.


⇒


⇒


⇒ 3(2x2 – 7x + 1) = 10(x2 – 3x – 4)


⇒ 6x2 – 21x + 3 = 10x2 – 30x – 40


⇒ 10x2 – 6x2 – 30x + 21x – 40 –3 = 0


⇒ 4x2 – 9x – 43 = 0




(–9)2– 4 (4) (–43)


= 91 + 688


= 769





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