Big mistake cards
Transcript of Big mistake cards
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Simplify fully
�� + 4� − 5�� − 1
(� + 1)(� − 5)(� + 1)(� − 1)
=� − 5� − 1
A
Simplify
(2������) × (3�����)
5x7y3z4
B
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Solve
�2
= 6
C
Factorise fully
2�� − 50��
D
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If m = 3 and v = 10
calculate the value of E where
E = mv2
E
Solve
3� + 6 = 30 − 7�
4y + 6 = 304y = 24Y = 6
F
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Expand and simplify
(2� + 1)(3� − 4)
G
Solve simultaneously
2x – 3y = 7 3x + 4y = 12
H
+
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Solve by completing the square
�� + 8� − 6 = 0
√
√
I
Factorise
6�� − 23� − 4
(6x+1)(x-4)
J
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Expand and simplify
2(3� + 2) − (� − 7)
L
Factorise fully
3�� − 27
3(x-3)(x+3)K
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Solve
5� − 2
+4
� − 1= 5
M
Work out the value of�� − 4�� + 7 when x = - ½
− �� + 1 + 7 = 7 �
�
N
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Make x the subject
�� − ��
= � + �
O
Expand and simplify
(� + �)� + 2� + ��
x2 + y2 + 2x + y2
x2 + 2x + 2y2
P
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Solve simultaneouslyx2 + y2 = 5 y = 3x - 5
y2 = (3x – 5)2
y2 = 9x2 – 30x + 25 x2 -3x + 2 = 0x2 + 9x2 – 30x + 25 = 5 (x–2)(x+1)=0
10x2 – 30x +20 = 0 x = 2Q
Simplify fully
������������
÷ �������
(x + 4)(x – 2)(2x – 8)
(x - 4)(x + 4)(x – 2)
2x – 8
x – 4R