Question

Hya think of a number "m" . She square it, add "y" to the answer and then subtract 7 from it. The final answer is "A". 1) Derive the formula for A 2) Using the formula, find the value of A when m= 3 and

Answer 1

Solution (1) :

Given, to find A we have to :

• square m
• Add y to m²
• Subtract 7 from m² + y

From the question, the following equation can be formed :

`=\tt A = {m}^(2) + y - 7`

Therefore, the formula for finding A = m² + y - 7

Solution (2) :

The value of A we can derive from the formula is :

`=\tt A = {m}^(2) + y - 7`

Value of m = 3 (given)

Which means :

`=\tt A = {3}^(2) + y - 7`

`=\tt \: A = 9 + y - 7`

`=\tt A = 9 - 7 + y`

`\color{plum} =\tt A = 2 + y`

Thus, the value of A = 2+y

Therefore, the value of A = 2+y