Question

find the roots of quadratic equation by factorisation method x²-3x-1=0​

Answer 1

꧁༺ᕼᗴYᗩ ᗰᗩTᗴ ༻꧂

using the quadratic formula, x can either

✔2.618 or -0.382

ᎬxᏢᏞᎪᏁᎪᏆᎥᎾᏁ

▶ax²+ bx + c =0

➩1x² +3x + (-1)

Ꭺ = 1

b = 3

Ꮯ= -1

➩᙭ = -ᗷ ± √ᗷ² - 4ᗩᑕ /2ᗩ

➩᙭ = -3±√4×1×(-1) / 2 × 1

➩᙭ = -3±√9-4/ 2

➩᙭ = -3 ±√5/2

➩᙭ = -3±2.236/2

➩᙭ 1 = -3 -2.236/2

➩᙭ 1 = - 5. 236/2

✎ ᙭ 1 = - 2.618

➩᙭ 2= -3 + 2.236/2

➩᙭ 2 = -0.764/2

✎ ᙭2 = -0.382

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