Question

Solving Quadratic equations using formula.
a) x2 + 7x = 7 and give your answer correct to one decimal places.
b) (x - 1)2 - 3x + 4 = 0 and give your answer correct to two significant figures​

Answer 1

Answer:

a) this is the answer of a

Answer 2

Step-by-step explanation:

given given equation isx2+7x=7

→x2+7x-7=0

using quadratic formula:

$x = \frac{ - 7 + \sqrt{49 + 28} }{2 } \\ x = \frac{ - 7 + \sqrt{77} }{2} \\ = 0.89 \\ - 7.89 \\ \\ \\ thus \: there \: are \: two \: values \: o \: x \: i.e \: 0.89 \: and \: 7.89 \:$