Question

solve
using 8r²= r+2 by
quadratic equation !​

Answer 1

Answer:

8r² = r + 2

Let us convert this into the form of ax² + bx + C = 0

=> 8r² - r - 2 = 0

Using the Quadratic Formula, we get:

x = ( -b ±√(b² - 4ac))/2a

So, r =

(-(-1) ±√((-1)²-4(8)(-2))/2(8)

= (1 ±√(1 + 24))/16

= 1 ±√(25)/16

=( 1 ±5)/16

So, the two zeroes are:

i) (1 + 5)/16 = 6/16

= 3/8

ii) (1 - 5)/16 = -4/16

= -1/4

Answer 2

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Solution