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OpenStudy (anonymous):
Let f(x)= x^2 +2x-1 and g(x)= 2x-4. Find 2f(x) -3g(x).
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OpenStudy (nenadmatematika):
=2x^2+4x-2-6x+12=2x^2-2x+10
OpenStudy (anonymous):
How do I know to multiply by 2 or 3 rather than putting it in for x?
OpenStudy (anonymous):
2f(x) means to multiply f(x) by 2 f(2) means to substitute the x for 2
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