Monday

January 26, 2015

January 26, 2015

Posted by **Reed** on Wednesday, August 22, 2012 at 9:25pm.

3x squared - 5x when x= -2 My Answer is 46. I got this by doing 3 times -2 and squaring that and then multiplying 5 times -2 and subtracting that ( negative 10 ) from 36. Is this correct?

- 9th grade Algebra -
**Kirk**, Wednesday, August 22, 2012 at 9:31pmIm sorry but you did it wrong. Remember your order of operations. First do whats in parenthasis, so nothing then exponents. catch me first off is you will get this when you substitute in. 3(-2)^2-5*-2. so you square your -2 which gives you -4 so now you got 3*-4-5*-2. so now we do our multiplication and divsion. -12+10 and we get -2

- 9th grade Algebra -
**Reiny**, Wednesday, August 22, 2012 at 10:46pm3x^2 - 5x

when x=-2 we get

3(-2)^2 - 5(-2)

= 3(4) + 10

= 12 + 10

= 22

**Answer this Question**

**Related Questions**

8th Grade Algebra: Answer Check #2 - Add or Subtract (Radicals) { this means ...

8th Grade Algebra-Radicals:Answer Check - Write each expression in simplest form...

8th Grade Algebra-Radicals:Answer Check - Change each decimal to a fraction in ...

math - How do i find the area of a triangle? For example: A squared + b squared...

College Algebra - Can someone check my answer please! I'm not sure this is right...

algebra - Evaluate (a-y)2(squared) +2y3(cubed), if a =2 and y=-3 A. -29 B. 43 C...

9th - Evaluate each expression. 9 ¸ 3 + 3 ´ 4 a. 24 b. 15 c. 17 d. 6 MY ANSWER ...

algerbra - i have to simply the expression 3x squared-10+4x+8-x squared, so far ...

algebra - Will someone check my work here and let me know if I am right. Thanks...

Algebra - i need to use the quadratic formula 2 solve these 4 questions: 1. x(...