Question

a-0
4. Simplify and find the value if m=-1.
(i) 2m-3 (m + 2)
(ii) 3 (m - 1) + 2 (m + 3)
(iii) m2 + 2m -(5m + 4)
(iv) 2m2 - 7+ 3(m - 2)
5. Simplify and find the value if x = 1, y = 0 and z=-2.
i) 2x - 7+ y - x
(ii) 3y + 4- x + y
(iii) x - 2 + 3 - 4y + 3z
(iv) x2 – 3y + 2 - 4 + 2y - 4z
What should be the value of p, if the value of 3x2 – 2x + p equals 3, when x = 1.​

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Step-by-step explanation:

4.

(i)2m-3(m+2)

2(-1)-3(-1+2)

-2-3

-5

(ii) 3 (m - 1) + 2 (m + 3)

3(-1-1)+2(-1+3)

3(-2)+2(2)

-6+4

-2

(iii)m2 + 2m -(5m + 4)

-1^2+2(-1)-(5(-1)+4)

1-2-(-5+4)

1-2-(-1)

1-2+1

0

(iv)2m2 - 7+ 3(m - 2)

2(-1)^2-7+3(-1-2)

2-7+3×-3

2-7+-9

2-16

-14

5.

i)2x - 7+ y - x

2(1)-7+0-(-2)

2-7+0+2

-5+2

-3

(ii) 3y + 4- x + y

3(0)+4-1+0

0+3

3

(iii) x - 2 + 3 - 4y + 3z

1-2+3-4(0)+3(-2)

2-0-6

-4

(iv) x2 – 3y + 2 - 4 + 2y - 4z

1^2-3(0)+2-4+2(0)-4(-2)

1-0+2-4+0+8

-1+8

7

3x^2 – 2x + p = 3 @ x=1

3(1)^2-2(1)+p=3

3-2+p=3

1+p=3

p=3-1

p=2