Question

Simplyfy: (3a (a-b) + b(a+b) and evaluate for a=1,b= -1


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Answer 1

Answer:

5

Step-by-step explanation:

=3*1(1-1)+1(1+1)

=3+2

=5

Answer 2

Answer:

$= 6$

Step-by-step explanation:

$= (3 {a}^{2} - 3ab) + (ab + {b}^{2} )$

Now, let's evaluate the value of a and b here.

$= ({3 ({1})^{2} - 3(1)( - 1)}) + ((1)( - 1) + ( { - 1})^{2}$)

$=( 3 + 3) + ( - 1 + 1)$

$= 6+ 0$

$= 6$

Curved bracket isn't supported in my device, so I used round brackets to solve the answer.

Hope it helps you..!