Question

$({b - 7}^{2} )$
${a }^{2} + {b}^{2} - 2ab$
ब्रैकेट बी माइनस 7 स्क्वायर ​

Answer 1

Explanation:

(b-7)²

(x - y)² = x² + y² - 2xy Putting x = b & y = 7

= (b)² + (7)² - 2(b)(7)

=b² +49-(2 × 7) × b

=b² +49-14b