Question

please solve all the questions

Question 3 [5] Consider the following: 5x-2x* + 3x - 4+3.x? a. Rearrange the terms in decreasing powers of x. b. How many terms does the expression have? c. What is the coefficient of x?? d. What is the constant term? e. Determine the value of the expression if x=-1. Question 4 a. Find the equation of the straight line passing through the points with co-ordinates (-1,4) and (1,2) [5] b. Find the equation of the line which has 4 as gradient and passing through the point with co- ordinates (2,6) [5]

Answer 1

3. The given polynomial is 543-2844 34-4+372 a). Rearranging the terms in decreasing powers of r, ove get, -2x4 +5x3 + 3x?+34-4 b). clearly, five terms are there. C). The coefficient of se? is 3 d). The constant term is -4. e) If we part x=-1, then the value of the expression will be -2.61 +5673 +3.44)2 +3.6-4 =-2-5+3 -3-4 Fall

vi a) We know that equation of a straight line passing through the points (211) and (22192) is y-y wirdz erre e-x2 so, the equation of the straight line passing through is (4,4) and Cr, 2) " 4 Rp1 = 4-2 4-1 ine, 4-4 Rp i ire, ire, 5. y-4=rxa aty = 3 So, the straight line is yetm=3. are know that the equation of straight line with gradient on and intercept con the y-axis is y = macac So, let equation of the straight line which has 4 as gradient be y=4kte since, it passing through (2,6), so 6=482te ie, @=-2 Therefore, the straight line is y = 4x-2