Solve by completing the square.v2+28v+45=0Write your answers as integers, proper or improper fractions in simplest form, or decimals rounded to the nearest hundredth.v= _____ or v= _____
Q. Solve by completing the square.v2+28v+45=0Write your answers as integers, proper or improper fractions in simplest form, or decimals rounded to the nearest hundredth.v= _____ or v= _____
Rewrite Equation: Rewrite the equation in the form of v2+bv=−c.Subtract 45 from both sides.v2+28v+45−45=0−45v2+28v=−45
Complete the Square: Choose the number to add to both sides to complete the square.Since (228)2=196, add 196 to both sides.v2+28v+196=−45+196v2+28v+196=151
Factor Perfect Square: Factor the left side as a perfect square.v2+28v+196=151(v+14)2=151
Take Square Root: Take the square root of both sides.(v+14)2=±151v+14=±151
Isolate Variable: Isolate the variable v.Subtract 14 from both sides.v+14−14=±151−14v=−14±151
Calculate Approximate Values: Calculate the approximate values of v.v≈−14+151 and v≈−14−151v≈−14+12.29 and v≈−14−12.29v≈−1.71 and v≈−26.29
More problems from Solve a quadratic equation by completing the square