Question

4a ^2+81 what term should be added to the expression to make it a perfect square

Answer 1

Answer:

$\huge\bigstar\huge\tt\underline\red{ᴀɴsᴡᴇʀ }\bigstar$

Question:-

$4 {a}^{2} + 81$

here to solve this we have to use this formula:-

${(a + b)}^{2} = {a}^{2} + {b}^{2} + 2ab$

now we compare :-

$4 {a}^{2} + 81 = {a}^{2} + 2ab + {b}^{2}$

$4 = {a}^{2}$

$a = 2$

so,the required equation is :-

$4 {a}^{2} + 2a + 81 = 0$

Hope it helps you..!!!!

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