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Given f ( x ) = 2 + 3x - x2 and g ( x ) = 2 x -1 evaluate ( f + g ) ( 4)
Solution
Through evaluate we mean one of two things based on what is in the parenthesis. If there is a number in the parenthesis then we desire a number. If there is an x (or no parenthesis, as that implies & x) then we will carry out the operation and simplify as much as possible.
( f + g ) ( 4) = f ( 4) + g ( 4)
= (2 + 3( 4) - 42 ) + (2 + 4( -1)
= -2 + 7
= 5
Maximise, p =168x+161y+158z+132w 475x+450y+440z+438w 250x+230y+220z+210w 119x+115.5y+114.8z+112.25w 160x+50y+120z+50w 12x+8.8y+7.4z+5.3w x >=4
Example : determine the zeroes of following polynomials. P ( x)= 5x 5 - 20x 4 +5x3 + 50x2 - 20x - 40 = 5 (x + 1) 2 ( x - 2) 3 Solution In this the factoring has been
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