Question

if a=4 and b=5,find the value of ab-a²​

Answer 1

Step-by-step explanation:

$4 \times 5 - (4) ^{2} \\ 20 - 16 \\ 4$

Answer 2

The value of ab-a² is 4

GIVEN:- a=4, b=5

TO FIND:- ab-a²

SOLUTION:-

• Square imply multiplication of itself. Thus, a² = 4² = (4 × 4)
• We need to substitute the values of a and b in the given expression to find the value of the expression.
• ab means ( a × b)

According to the question,

ab - a²

By substituting the value

= 4 × 5 - (4)²

= 20 - (4 × 4)

= 20 - 16

= 4

Hence, the value of ab-a² is 4

#SPJ2