4x² + 3x + 5 = 0
x = <u>-3 +/- √(3² - 4(4)(5))</u>
2(4)
x = <u>-3 +/- √(9 - 80)</u>
8
x = <u>-3 +/- √(-71)
</u> 8<u>
</u>x = <u>-3 +/- √(71 × (-1))</u>
8
x = <u>-3 +/- √(71) × √(-1)
</u> 8<u>
</u>x = <u>-3 +/- 8.43i
</u> 8
x = -0.375 +/- 1.05375i
x = -0.375 + 1.05375i x = -0.375 - 1.05375i
<u />
They are multiplicative inverses. For example, the reciprocal of 2/3 is 3/2. They are used when dividing fractions
(x+1)^2 +(y-1)^2 =9
x+ the x coordinate squared + y +the y coordinate squared = the radius squared
The answer would be:
Three and one-tenths
3 . 1 =3.1
