Question

(2+a)(2-a)+(3+a)2 при a=3,5

Answer 1

5.5*(-1.5)+6,5*2=-8.25+13=4.75

Answer 2

To evaluate the expression (2+a)(2-a) + (3+a)2 when a = 3.5, we can substitute the value of a into the expression and perform the calculations.

Let's substitute a = 3.5 into the expression:

(2 + a)(2 - a) + (3 + a)2

= (2 + 3.5)(2 - 3.5) + (3 + 3.5)2

Now we can simplify the expression using arithmetic:

= (5.5)(-1.5) + (6.5)2

= -8.25 + 42.25

= 34

Therefore, when a = 3.5, the value of the expression (2+a)(2-a) + (3+a)2 is 34.