(-3-x) ^2 simplify it using algebric identity ​

Answers 1

Answer:

(a-b)^2= a^2-2ab-b^2

(-3-x)^2= -3^2-2*3*x^2

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if When it lands at the end of the flight, it travels on the ground at a constant speed. Explain how this aircraft can accelerate even when it is travelling at a constant speed.​

Answer:

Acceleration is defined as the rate of change of Velocity. Dance velocity is a vector quality, thus it had a magnitude and direction. Magnitude is speed of plane and direction is the direction of movement of plane. Hence, if a plane changes its direction keeping the speed constant, then also acceleration is being observwd

9.1 Rationalise the denominator of the following: 3 1 √5 (C) 2√5 7 + 2√6 √3+ √2 (a) (b) (a) 9.2 Find the value of the variables in each of the following: 7 + 3√5 (b) √11+√3 3 3√11 +5√3 4 =- 5+2√5 = (d) 1 + a√5 √7 +√3 √7-√3 b√33 (e) (c) 6√5 +4√7 √45 -√28 6 + √2 6-√2 (f) 6-√2 6+ √2 √6 + √2 √6-√2 = a - b√2​

Answer:

i) 1/√7

Dividing and multiplying by √7, we get

1/√7 = (1/√7) × (√7/√7)

= √7/7

ii) 1/ (√7 - √6)

Dividing and multiplying by √7 + √6, we get

1/(√7 - √6) = [1/(√7 - √6)] × (√7 + √6) / (√7 + √6)

Using identity (a + b)(a - b) = (a² - b²)

= (√7 + √6) / (√7)² - (√6)²

= (√7 + √6) / (7 - 6)

= √7 + √6

iii) 1/(√5 + √2)

Dividing and multiplying by √5 - √2, we get

= [1/(√5 + √2)] × (√5 - √2)/(√5 - √2)

Using identity (a + b)(a - b) = (a² - b²)

= (√5 - √2) / (√5)² - (√2)²

= (√5 - √2) / (5 - 2)

= (√5 - √2) / 3

iv) 1/(√7 - 2)

Dividing and multiplying by √7 + 2, we get

1/(√7 - 2) = [1/(√7 - 2)] × (√7 + 2)/(√7 + 2)

Using identity (a + b)(a - b) = (a² - b²)

= (√7 + 2) / (√7)² - (2)²

= (√7 + 2) / (7 - 4)

= (√7 + 2) / 3

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9. The perimeter of a triangle is 7x² - 17xy +5y² +8and two of its sides are 4x² - 7xy + 4y²-3 and 5+6y²-8xy + x². Find the third side of the triangle.​

Answer:

Third side is 4

Step-by-step explanation:

[tex]14x - 17x + 10y + 8 = 21[/tex]

[tex]8x - 7x + 8y - 3 = 6[/tex]

[tex]5 + 12y - 8xy + x2 = 11[/tex]

[tex]11 + 6 = 17[/tex]

[tex]21 - 17 = 4[/tex]

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5 lines about bijli ka khamba in Hindi ​

Answer:

:पावर हाऊस तो सैकड़ों मील दूर होते हैं,

:जहां बिजली बनती है फिर खंभों पर लगे तारों के द्वारा हमारे घरों तक पहुंचती है।

:यह खंभें जंगल-पहाड़ों में अकेले खड़े हैं।

:सर्दी-गर्मी, बरसात सब सहन करते हैं

:आपको बिजली पहुंचाते हैं।

Explanation:

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