Evaluating Expressions and Substitutions

To understand the concept of limits

To evaluate an expression for a given variable

To solve a quadratic equation

To learn about the history of mathematics

3 times the quantity a plus 4 minus 2a squared over 5

5 times the quantity a plus 2 minus 4a squared over 3

7 times the quantity a plus 1 minus 3a squared over 2

2 times the quantity a plus 3 minus 5a squared over 4

8

5

7

6

Multiply the entire expression by 2

Replace 'a' with 7 in the expression

Add 5 to the expression

Divide the expression by 3

10

11

9

8

49

47

48

50

35

45

40

50

200

196

186

192

Negative 154

Negative 151

Negative 152

Negative 153

Negative 151 over 2

Negative 151 over 3

Negative 151 over 4

Negative 151 over 5