Question

show that a² +3a+12 = 132 is not true for a= -5 and for a = 0.​

Answer 1

Putting value of a = 0,

Now, let's solve the equation

a²+3a+12

0²+3(0)+12

0+0+12 = 12

and 12 is not equal to 132

Putting value of a = -5,

Now, let's solve the equation,

a²+3a+12

-5²+3(-5)+12

25+(-15)+12 = 22

and 22 is not equal to 132