Question

1. If x = 4, find the value of each of the following.
(i) 5x
(ii) -2x
(iii) x-5
(iv)
vszx+3
2. If a = -2, find the values of the following polynomials.
(i) 2a +4
(ii) 7-3a
(iii) a2 + 1
(iv) 4-a?
3. If p =5, find the values of the following polynomials.
(i) 1+ p + p2
(ii) 4 + 3p-p
(iii) 5p2 – 8p (iv) p3 - 4p? + P
4. Find the value of 5x2 – 3x + 7 when
1
(i) x = 0,
(ii) x = 3,
(iii) x = -4,
(iv) x =
2
5. If x = 1 and y = 2 then find the values of the following algebraic expressions.
(i) 3x + 4y
(ii) -2x +9y
(iii) 5x - 3y
(iv) x + 5y - 6
6. If a = 6 and b = 3 then find the values of the following algebraic expressions.
(i) a 2 + b 2
(ii) -10ab
(iii) a2 + ab + b 2
(iv) (a + b)2
b2-a2
(vi) 3
b
b
a
b
vii +
а
11orino​

Answer 1

Answer:

1)5x

if x= 4

$5 \times 4$

$20$

2) -2x

$- 2x$

$- 2 \times 4$

@= -8