Two negative integers are 5 units apart on the number line, and their product is 126. What is the sum of the two integers?
2 answers:
lets say that y is biggerr y-x=5 and y=x+5 pproduct is 126 xy=126 substiutute x+5 for y (x+5)(x)=126 x^2+5x=126 x^2+5x-126=0 factor whaat 2 numbbers multtiply to get -126 aand addd to gget 5 -9 and 14 (x-9)(x+14)=0 sset to zzero x-9=0 x=9, nah we nneed 2 nnegative nnumbers x+14=0 x=-14 so thenn y=x+5 y=-14+5 y=-9 the summ is -14-9=-23
If b>a, b-a=5 so b=5+a ab=126, using b from above a(5+a)=126 5a+a^2=126 a^2+5a-126=0 (a+14)(a-9)=0, since a<0 the numbers are -14 and -9
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