1.

Factorise x^2 - 3x - 1 = 0​

Answer»

ANSWER:

EXPLANATION:

ax2+bx+c=0

1x2+3x+−1=0

a=1

b=3

c=−1

x=−b±√b2−4ac2a

x=−3±√32−4×1×−12×1

x=−3±√9−42

x=−3±√52

x=−3±2.2362

x1=−3−2.2362

x1=−5.2362

x1=−2.618

x2=−3+2.2362

x2=−0.7642

x2=−0.382



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