Question

Solve by using tables. Give each answer to at most two decimal places.
7x^2 + 5x - 3 = 0

a. 0.39, -1.1
b. 1.1, -0.39
c. 0.78, -2.21
d. 0.75, -0.75

Answer 1

is a which is 0.39,-1.1

Answer 2

Could you tell me how you got a? So I know how to do similar problems like these

Answer 3

take\[7x^2+5x-3=0\]

Answer 4

\[use quadratic formula \rightarrow x=(-b \pm \sqrt{b^2-4ac})/2a\]

Answer 5

\[a=7 \rightarrow b=5 \rightarrow c=-3\]

Answer 6

put it in the formula

Answer 7

this is true using this formula u will get

Answer 8

\[x=(-5\pm \sqrt{25+84})/14\]

Answer 9

then \[x=(-5\pm \sqrt{109})/14\]

Answer 10

\[\frac{ -5pm sqrt{25-4(7)(-3)} }{ 2(7) }\]

Answer 11

pm is plus minus

Answer 12

\[x=(-5\pm10.4)/14\]

Answer 13

\[x=0.39 or-1.1\]

Answer 14

do understand ?

Answer 15

Yes I do. Thank you for your help

Answer 16

dont worry !!!