Question

(за - 1/2) (за - 1/2)​

Answer 1

Step-by-step explanation:

3a-1/2)(3a-1/2)

(3a-1/2)²

(3a)²+(1/2)²-2(3a)(1/2)

9a²+1/4-3a

Answer 2

Answer:

$(3a - \frac{1}{2} ) {}^{2} \\ = (3a) {}^{2} - 2 \times 3a \times \frac{1}{2} + ( \frac{1}{2} ) {}^{2} \\ = 9a {}^{2} - 3a + \frac{1}{4}$