WorksheetsFormule de calcul prescurtat
Total questions: 10
Worksheet time: 5mins
Name
Class
Date
1.
( x + y )2 =
a)
x2+y2
b)
x2-2xy+y2
c)
x2-y2
d)
x2+2xy+y2
2.
( 5 + a )2 =
a)
25+5a+a2
b)
25+10a+a2
c)
25-10a+a2
d)
25-a2
3.
( y + 1 )2 =
a)
y2-1
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b)
y2+1
c)
y2-2y+1
d)
y2+2y+1
4.
(√6 + √7)2 =
a)
13+2√42
b)
13-2√42
c)
13
d)
13+√42
5.
( a + 4 )( a – 4 ) =
a)
a2+16
b)
a2-16
c)
a2-4
d)
a2-8a+16
6.
( 3 – x )2 =
a)
9+6x+x2
b)
9-6x+x2
c)
9-x2
d)
9-3x+x2
7.
( 0,6 + a )( 0,6 – a ) =
a)
0,36-a2
b)
a2-0,36
c)
36-a2
d)
3,6-a2
8.
Alegeți formula corectă
a)
(a+b)(a-b)=a2-2ab+b2
b)
(a+b)(a-b)=a2b2
c)
(a+b)(a-b)=a2-b2
d)
(a+b)(a-b)=a2+b2
9.
( 2a – 3b )2 =
a)
4a2-6ab+9b2
b)
4a2-9b2
c)
4a2+12ab+9b2
d)
4a2-12ab+9b2
10.
(4m – 5 )2 =
a)
16m2-40m+25
b)
16m2+40m+25
c)
16m2-25
d)
16m2-20m+25
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