Question

Expand : 1. (3a + 1/3a) ^ 2
2. (2x + y + z) ^ 2

Answer 1

Answer:

1.

By using Identity a2-2ab+b2

(3a)2-2*3a *1/3b+(1/3b)2

9a2-2ab+1/9b2

2.

(2x)2+(y)2+(z)2+2(2xy)+2yz+2(2xz)

(Identity:x2+y2+z2+2xy+2yz+2zx)

4x2+y2+z2+4xy+2yz+4zx

PLEASE MARK IT AS BRAINLIEST!

Answer 2

${(3a + \frac{1}{3a})}^{2}$

$({3a})^{2} + ({ \frac{1}{3a} })^{2} + 2 \times 3a \times \frac{1}{3a}$

Answer

${9a}^{2} + \frac{1}{ {9a}^{2} } + 2$

2 nd Question

$(2x + y + z) ^ 2 </p><p>$

${(2x)}^{2} + {(y)}^{2} + {(z)}^{2} + 2 \times 2x \times y + 2 \times y \times z + 2 \times z \times 2x$

Answer

${4x}^{2} + {y}^{2} + {z}^{2} + 4xy + 2 yz + 4xz$