The value of b in the equation 5/2b+(-25/2) is 1.
Ok, so the quadratic coefient is 1, so great
take 1/2 of the linear coefient and square it
10/2=5, (5)^2=25
add that to both sides
x^2+10x+25=7+25
factor perfect square trionomial
(x+5)^2=32
squaer root both sides
x+5=+/-4√2
minus 5
x=-5+/-4√2
x=-5+4√2 and -5-4√2
Answer:
none
Step-by-step explanation:
Answer:
682
Step-by-step explanation:
620, percentage decreased by - 10% (percent) of its value = 682
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