lacooGremilyspat6ty lacooGremilyspat6ty
  • 01-03-2017
  • Mathematics
contestada

Find the value of c that would make x2 + cx + 144 a perfect square.
a) 6
b) 12
c) 24
d) 72

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Аноним Аноним
  • 01-03-2017
answer is c) 24
---------------------------------------
x^2 + 2(x)(12) + 12^2 
= x^2 + 24x + 144
= (x+12)^2
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ChandrikaP ChandrikaP
  • 01-03-2017
x^2+cx+144
it is like a^2+2a*b+b^2=(a+b)^2

here a=x ,b=12 and 2a.b=cx c=2*x*12=cx
c=24

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