<PRE><B>Question 1063061</B>
A - B = 1
:
1) A = B + 1
:
2) 2A^2 + 20 = B^3
:
substitute for A in equation 2 using equation 1
:
2(B+1)^2 + 20 = B^3
:
2(B^2+2B+1) + 20 = B^3
:
2B^2 +4B +2 + 20 = B^3
:
B^3 -2B^2 -4B -22 = 0
:
a graph of this equation will help
:
{{{ graph( 300, 200, -0.3, 5.2, -35, 40, x^3-2x^2-4x-22) }}}
:
B is approximately 4.2
:
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A is 5.2 and B is 4.2
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