What multiplies to 1.25 and adds up to 3

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Mathematics

2 September, 19:43

What multiplies to 1.25 and adds up to 3

+5

Answers (1)

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Taryn · Answer 1

2.5

Step-by-step explanation:

l x+y=3

ll x*y=1.25

l x=3-y

ll (3-y) * y = 1.25

ll - y^2+3y-1.25=0

ll y^2-3y+1.25=0

a=1

b = - 3

c=1.25

y1, 2 = (3+/-sqrt (9-4*1.25)) / 2

y1, 2 = (3+/-2) / 2

y1=1.25 = >x=3-2.5=0.5

y2=0.5=> x=3-0.5=2.5

the numbers: o. 5, 2.5