can u help me solve this ?

Question

this is an algebra equation which the answer to it is -9 but i cant seem to solve it. i keep gettin the wrong answer

b to the power of 2 + 5b - 3 when b = -2

Answer 1

-2 times -2 equals 4, then 5 times -2 is -10..you add them together and get -6...then -6 minus -3 is -9

Answer 2

Sure,whynot?

you said that, the equation is, b to the power of 2+5b - 3
while the result is -9
and the value of b is -2.

ok,Lets start

b raised 2+5b-3=-9 b=-2
and substitute every letter by -2
{(-2raised 2)+[5(-2)]-3}=-9
{(-2x-2)+(-10)-3}=-9
{4+(-10)-3}=-9
{(4-10)-3}=-9
{-6-3}=-9
-9=-9

hope it helps

Answer 3

Step 1 2 + 5b - 3 = ? and b = 2

Step 2 2 + 5 (2) - 3 = ?

Step 3 2 + 10 - 3 = ?

Step 4 12 - 3 = 9

Answer 4

whats wrong in that !!!
b2+5b-3//when b=-2
the sqaure of -2 is =4
thus 4+5b-3
4+5(-2)-3
4-10-3
4-13
= -9

Answer 5

b to the power of two would = 4 ... (-2)*(-2) = 4
+5b = -10
so, with the three terms as numerical values, you are left with
4 -10 -3 = -9

Answer 6

I will be glad to help.

first solve the initial problem by substituting -2 for b
-2^2 + 5(-2) -3 = neg 2 squared is +4
4 + (-10) - 3 = then solve
4 + -13 = -9

when subtracting, add the opposite;
in other words make it an addition problem by adding a negative.

I hope this helps!

Answer 7

dude, that was simple...I did it in my mind in 5 seconds. Just always remember that 2 negatives muliplied become a postive and a negative and a postive mulitplied becomes a negative answer. That's probably where you messed up.

Answer 8

i am not knowing