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Chapter 9: Q. 9.29TI (page 879)

Solve by completing the square :

a2+4a+9=30

Short Answer

Expert verified

The required values of aare3,-7

Step by step solution

01

Given information

a2+4a+9=30

02

Calculation

a2+4a+9=30鈬�a2+4a=21鈬�a2+4a+(12脳4)2=21鈬�a2+4a+4=21+4鈬�(a+2)2=25鈬�a+2=卤25鈬�a=-2卤5=3,-7

The required solutions of aare3,-7

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