Question 19

What number must be added to the expression $$16a^2 - 12a$$ to make it a perfect square?

Solution

$$16a^2 - 12a$$ = $$\left(4a\right)^2-\left(2\right)\left(4a\right)\left(\ \frac{\ 3}{2}\right)$$

by adding $$\left(\ \frac{\ 3}{2}\right)^2\ $$ we can write it as $$\left(\ 4a-\frac{\ 3}{2}\right)^2\ $$

Hence $$\left(\frac{\ 3}{2}\right)^2\ =\ \ \frac{\ 9}{4}$$ is required answer

Share on Whatsapp Share on Whatsapp

Click on the Email ☝️ to Watch the Video Solution

Create a FREE account and get:

SNAP Quant Questions | SNAP Quantitative Ability

SNAP Data Interpretation Questions SNAP Logical Reasoning Questions

SNAP Syllabus

SNAP Admit Card

SNAP Cutoffs

SNAP Eligibility Criteria

SNAP Exam Dates

SNAP Colleges List

SNAP Study Material

SNAP Registration

SNAP Result

SNAP Previous Year Papers

SNAP Crash Course

SNAP Mock Tests