Answered

Welcome to Westonci.ca, the Q&A platform where your questions are met with detailed answers from experienced experts. Our platform provides a seamless experience for finding reliable answers from a network of experienced professionals. Get precise and detailed answers to your questions from a knowledgeable community of experts on our Q&A platform.

if f(x) =3x^2 -7 and g(x)=2x+a , find a so that the graph of f(g) crosses the y axis at 68

Sagot :

konrad509
[tex]f(g(x))=3(2x+a)^2-7\\\\ 3(2\cdot0+a)^2-7=68\\ 3(2+a)^2=75\\ (a+2)^2=25\\ a+2=5 \vee a+2=-5\\ a=3 \vee a=-7[/tex]
shubhamchouhanvrVT

The value of a is equal to +5 and -5.

What is an expression?

Expression in maths is defined as the collection of the numbers variables and functions by using signs like addition, subtraction, multiplication, and division.

The value of a is calculated as:-

3x² - 7 = 68

3 ( 2x + a)² -7 = 68

Put x = 0

3 ( a ) ² = 75

a ² = 75 / 3

a  = √25

a = ±5

Therefore, the value of a is equal to +5 and -5.

To know more about Expression follow

https://brainly.com/question/723406

#SPJ2

We appreciate your visit. Hopefully, the answers you found were beneficial. Don't hesitate to come back for more information. Thank you for your visit. We're dedicated to helping you find the information you need, whenever you need it. Thank you for choosing Westonci.ca as your information source. We look forward to your next visit.