Question

please solve it

spam = 15 reported ​

Answer 1

Step-by-step explanation

1. (5a + 6b)²

= (5a×5a+6b×6b)

= 25a²+36b² ✓

Answer 2

Answer:

indntity used -

(a + b) ² = a²+b² + 2ab

(a-b )² = a² + b² - 2ab

a) (5a+ 6b)² = 25a²+ 36b²+60ab

b)

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

c ) ( 2p - 3q )² = 4p²+9q²- 12pq

d) ( x - 2/ x ) ² = x² + 4 /( x² ) - 4

e) ( ax + by ) ² = a²x²+ b²y² + 2axby

f ) (7m - 4)² = 49m² + 16 - 56m

g ) ( x + 1/2 ) ² = x² + 1 /4 + x

h ) ( a -1 / a ) ² = a² + 1 / a² - 2

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

here in 2 × a ×1 / a

'a ' will get cancel with the a in simple language a will get divided by a so it will become 1 so the final answer will be 2

same goes for question no. d

hope it help