Question

The sum and product of two numbers x and y are 3 and 1.25 respectively. Form two
equations involving x and y and solve them to obtain the possible values of x and of y.


Please solve thissss pleaseee I have test tomorrow

Answer 1

Answer:

X+Y=3........(1)

X×Y=1.25........(2)

i) In (1):X+Y=3

X=3-Y.......(3)

ii)Subt (3) in (2)

XY=1.25

(3-Y)Y=1.25

3Y -Y²=1.25

0=Y²-3Y+1.25

$\frac{ - ( - 3) + \sqrt{( - 3) { }^{2} - 4(1)(1.25) } }{2(1)}$

Y=2.5 OR Y=0.5(when you substitute a minus -)

iii)Substitute the Y values in (3)