Mr. Osama
Member
i put the 2 questions on word document...can someonce plz post up how to do em.
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what does that dot on top of the two mean.Trefoil said:a.) a(x-1)2 +b(x-1)+c º x2
Answer: expand and equate
ax^b-2ax+a+bx-b+c=x^2
a=1
x^b-2x+1+bx-b+c=x^2
-2+b=0
b=2
2+c=0
c=-2
Solution set:
{b=2
{c=-2
a(x+2) 2 + b(x+3) 2 + c(x +4) 2 º 2x2 + 8x +6
ax^2+4ax+4a+bx^2+6bx+9b+cx^2+8cx^2+16c=2x^2+8x+6
x^2(a+b+c) + x(4a+6b+8c) + (4a+9b+16c) = 2x^2+8x+6
1) 2=a+b+c
2) 8=4a+6b+8c
3) 6=4a+9b+16c
2)-3):
4) 2=-3b-8c -> 4)' -2=3b+8c
2)-4*1):
5)0=b+2c -> 5)' 0=4b+8c
5)'-4)':
isn't it a-b+c=0 so 1-2+c=0 so c=1Trefoil said:a.) a(x-1)2 +b(x-1)+c º x2
Answer: expand and equate
ax^b-2ax+a+bx-b+c=x^2
a=1
x^b-2x+1+bx-b+c=x^2
-2+b=0
b=2
2+c=0
c=-2
Solution set:
{b=2
{c=-2