4479011
Description
Quiz by Josh Anderson, updated more than 1 year ago
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Created by Josh Anderson
almost 9 years ago
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Question 1
Question
Expand the brackets.
25(5-y)
[blank_start]125[blank_end]-[blank_start]25[blank_end]y
Answer
-
125
-
25
Question 2
Question
Expand and simplify.
x(5x-20)-y(20y-23)-70y
Answer
-
5x²-20x-20y²-23y-70y
-
5x²-20x-20y²-93y
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5x²-20x+20y²-23y-70y
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5x²-20x+20y²-93y
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5x²-20x-20y²+23y-70y
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5x²-20x-20y²+47y
Question 3
Question
Expand and simplify.
(15x+200)(2x-30)
[blank_start]30[blank_end]x²[blank_start]-450[blank_end]x+[blank_start]400[blank_end]x[blank_start]-6000[blank_end]
[blank_start]30x[blank_end]²[blank_start]-50x[blank_end]-[blank_start]6000[blank_end]
Answer
-
30
-
400
-
-6000
-
-450
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450
-
30x
-
-50x
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50x
-
6000
Question 4
Question
(x+y)(x-y), for any value of y, equals x squared plus 2xy minus the value of y squared
For example (x+4)(x-4) = x squared + 8x - 16
Answer
- True
- False
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