Square roots and calculating with letters (basics)

• Wiskunde
• Middelbare school
• havo, vwo
• Leerjaar 1

Math

(−5)​2​​−√​49​​​=

1. -18
2. -32
3. 32
4. 18

Only type in the answer.

−3​2​​+√​(20+5)​​​=

​2​​1​​√​100​​​=

Note: Working with formulas

Formula:

Calculate y for

y=3x​2​​

x=4

Formula:

Calculate y for

y=​3​​1​​x​2​​

x=−9

If 2 apples + 3 apples = 5 apples,
what is then: 2a + 3a?

1. a
2. 6a
3. 5a
4. 5a​2​​

5c + 10c = ....

If

What is then:

5+5+5=3⋅5

a+a+a+a=

If
What is then:
(for 'squared' type in ....^2)

4⋅4=4​2​​

w⋅w=

Last question!