Question

Evaluate ( 7/8x+4/5y) ^2​

Answer 1

Answer:

hi math lover

Step-by-step explanation:

pls follow m

Answer 2

Question -:

Evaluate:

$\small \sf( \frac{7}{8} x + \frac{4}{5} y {)}^{2}$

Explanation -:

Formula

$\boxed{ \small \sf (a + b {)}^{2} = {a}^{2} + 2ab + {b}^{2} }$

Solution

$\small\bf ( \frac{7}{8}x + \frac{4}{5} y {)}^{2}$

$→\small \sf{( \frac{7}{8}x {)}^{2} + 2 \times \frac{7}{8}x \times \frac{4}{5}y + ( \frac{4}{5}y {)}^{2} }$

$→ \small\sf { \frac{49}{64} {x}^{2} + \frac{7xy}{5} + \frac{16 {y}^{2} }{25} }$

$\rule{60mm}{1pt}$

Additional Information -:

$\star \: \boxed {\small\sf (a + b {)}^{2} = {a}^{2} + 2ab + {b}^{2} }$

$\star \boxed{ \small \sf{(a - b {)}^{2} = {a}^{2} - 2ab + {b}^{2} }}$

$\star\boxed { \small \sf{ {a}^{2} - {b}^{2} = (a + b)(a - b) }}$

$\star\boxed { \small\sf{ {a}^{3} + {b}^{3} = (a + b) ( {a}^{2} - ab + {b}^{2} ) }}$

$\star\boxed { \small\sf{ {a}^{3} - {b}^{3} = (a - b) ( {a}^{2} + ab + {b}^{2} ) }}$

$\rule{65mm}{3pt}$