Question

4x(2x+5) -1 and find its value for x=-1

Answer 1

Step-by-step explanation:

4x(2x+5) -1

If there is a sign of 'multiplication' at the marked place, the solution will be as follows :-

= 4(-2+5)-1

= 4(-2+5)-1= 4(3)-1

= 12-1

= 12-1

= 11

If there is 'x' at the marked place, the solution will be as follows :-

4(-1)[2(-1) +5]-1

= -4(-2+5) -1

= -4 (3) -1

= -12 -1

= -13