Question

find the following by using the identities (class8)1. (190)^2
2. (44)^2
3. (173)×(227)
4. (144)×(256)

Answer 1

ANSWER IS HERE

1)
${190}^{2}$

$( {200 - 10})^{2}$

${a}^{2} - {b}^{2} = {a}^{2} - 2ab + {b}^{2}$

${200}^{2} - 2 \times 200 \times 10$

40000+4000

The answer is 44000

2)
${44}^{2}$

$( {40 + 4})^{2}$

$( {a + b})^{2} = {a}^{2} + 2b + {b}^{2}$

${40}^{2} + 2 \times 40 \times 4 + {4}^{2}$

1600+320+16

The answer is 1936

3)(173 ×227)

(200-27)(200+27)

${a}^{2} - {b}^{2} = (a + b)(a - b)$
a=200

b =27

${200}^{2} - {27}^{2}$

The answer is 39271

4)(144)×(256)

(200-56)(200+56)

${a}^{2} - {b}^{2} = (a + b)(a - b)$
a=200

b=56

${200}^{2} - {56}^{2}$

The answer is 36864

HOPE IT HELPS YOU

BRAINLIEST ANSWER

Answer 2

Hey mate ....

here's Ur answer....

1) 190^2

(200-10)^2

a2 - b2 = a2 - 2ab + b2

200^2 × 200 × 10

40000 + 4000

44000

2) 44^2

(40 + 4)^2

(a + b) ^2 = a2 + 2b + b2

40^2 + 2 × 40 × 4 × 4^2

1600 + 320 + 16

1936

3) (173 × 227)

(200 - 27) ( 200 + 27)

a2 - b2 = (a+B) (a-b)

200^2 - 27^2

= 39271

4) 144 × 256

(200-56) (200+56)

a2 - b2 = (a+B) (a-b)

200^2 - 56^2

= 36864

Hope it Helps♥♥❤❤