Find the value of k if (x - 3) is a factor of 4x + 3x - 4k +7
Answers
Answered by
11
x-3=0
x=3
p(x)=4x+3x-4k+7
p(1)=4(3)+3(3)-4k+7
=>4(3)+3(3)-4k+7=0
=>12+9-4k+7=0
=>28-4k=0
=>-4k= -28
=>k= -28/-4
=>k = 7
Thus,value of k is 7.
Answered by
1
let p(x) = 4x + 3x - 4k + 7
when p(x) is divided by ( x-3)
x-3=0
=> x = 3
therefore
p(3)=0
4*3 + 3*3 -4k +7 = 0
=>12 + 9 -4k + 7 = 0
=> -4k = -28
=> k = 7
( * ) means multiply
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