Question

EXERCISE 6.3
1. If x = 3, find the value of the following:
2
x-1
3
(a) x + 3
(b) 3x - 6
(c) 9 – 3x
(d)
2. If x = -1, find the value of the following:
(a) 3x – 1
(b) –3x2 + 2x – 1 (c) = x - x2 + x-1 (d) x² + x + 1
3. If x = 1 and y=-1, find the value of the following:
(a) x2 + y2
(b) x2 + y2 + xy
(c) 3x² + 3y2 – 3xy (d) x² + y2 – 2xy
4. Find the value of the following expressions when x = 0, y = -2.
(a) x² + y2 + 2xy (b) x2 - y2
(c) 2x² + 2y2 – xy (d) x2 - xy + y2
5. Simplify the expressions and find the value when x = -2.
(a) 3(x + 5) - x - 7 (b) x + 5 – 2(x – 5) (c) 2(4x - 1) + 4(2x + 1)
6. What should be the value of p if the value of 3x2 + 4x - p is 5, when (a) x = -1, (b) x = 12
Z> Find the value of the expression a' – b3 + 3ab(a - b) when a = -3, b = 1.
Use of Algebraic Expressions
Algebraic expressions are used to write certain rules or formulas in a concise but general form.
For example, area of a rectangle = 1 x b, where l = length of the rectangle and b = breadth of the
rectangle
diagonals that can be drawn from a vertex of a quadrilateral, pentagon, hexagon,
be
ghịch​

Answer 1

Answer:

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