Step-by-step explanation:
x = one odd number
the second odd number is (x+2), as both are consecutive.
so,
x × (x + 2) = 195
x² + 2x = 195
x² + 2x - 195 = 0
the formula to solve this is
x = (-b ± sqrt(b² - 4ac))/(2a)
in our case
a = 1
b = 2
c = -195
x = (-2 ± sqrt(4 - 4×1×-195))/(2×1) =
= (-2 ± sqrt(4 + 4×195))/2 = (-2 ± sqrt(784))/2 =
= (-2 ± 28)/2 = -1 ± 14
x1 = -1 + 14 = 13
x2 = -1 - 14 = -15 which is invalid as the numbers are positive.
so, the two numbers are 13 and 15.
So the step process for this is to factor it out so this is a complex trinomial so u will have to multiply 2 by -9 and the rest should be in your notes .
then once u factor it out you rearrange those two factored brackets and example of this would be
(x+3)(2x+1)
so x+3=0
therefore x=-3. you bring the 3 over to where the zero is and change the sign
for 2x+1=0
2x=-1
2x/2=-1
x=-1/2
so for this one you isolate for x and in order to get rid of 2x you divide by 2 for both
The answer to your question is B the second option
For finding the usd to pounds, you will cross multiply. This is just to make it easier to understand. You put the one dollar over the .79. as if it were a fraction, you then put how much usd you have, so in this case 12,500 dollars right next to where you put the one dollar. you obviously don't know how much euro you have so you leave the bottom portion blank. Then you multiply the 12,500 by .79. then divide by 1
