Please answer this question. Both question 25 and 26...
Thank you
Attachments:
Answers
Answered by
1
26) volume of cuboid=4x^3+20x^2+33x+18
if x=-1
4(-1)^3+20(-1)^2+33(-1)+18
-4+20-33+18
38-37=1
if x=-2
4(-2)^3+20(-2)^2+33(-2)+18
-32+80-66+18
98-98=0
x+2 is a factor
4x^3+20x^2+33x+18
4x^3+8x^2+12x^2+24x+9x+18
4x^2(x+2)+12x(x+2)+9(x+2)
(x+2)(4x^2+12x+9)
(x+2)(4x^2+6x+6x+9)
(x+2)(2x(2x+3)+3(2x+3)
(x+2)(2x+3)(2x+3
if x=-1
4(-1)^3+20(-1)^2+33(-1)+18
-4+20-33+18
38-37=1
if x=-2
4(-2)^3+20(-2)^2+33(-2)+18
-32+80-66+18
98-98=0
x+2 is a factor
4x^3+20x^2+33x+18
4x^3+8x^2+12x^2+24x+9x+18
4x^2(x+2)+12x(x+2)+9(x+2)
(x+2)(4x^2+12x+9)
(x+2)(4x^2+6x+6x+9)
(x+2)(2x(2x+3)+3(2x+3)
(x+2)(2x+3)(2x+3
rainepulease23:
Thank you so much. Any idea how to solve q 25?
same way
Similar questions