Question

Simplify 5a-5-7a3a+2,and find the value, if a=1,b=2.​

Answer 1

Step-by-step explanation:

substitute a=1 and b=2

5(1)-5-7(1)×3(1)+2

= 5-5-7×3+2

= (-23)

Answer 2

Answer:

The correct answer is -19

= 5a-5-7a3a+2. Here ( a=1; and b=2)

= 5(1)-5-7(1)3(1)+2

= 5-5-(7×3)+2

= 5-5-21+2

= -19