Chemistry, asked by pragyarani2801, 6 hours ago

in this attachment I ask some question please give me proper answer in attachment of all questions please I request​

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Answered by visalakshins00
2

Answer:

(a) (3x + 5y)² = [(3x)² + (2) (3x) (5y) + (5y)²]

= 9x² + 25y² + 30xy

(b) (17a - 4)² = [(17a)² - (2) (17a) (4) + (-4)²]

= 289a² - 136a + 16

(c) (2p/3 - 12)² = [(2p/3)² - (2) (2p/3) (12) + (-12)²]

= 4p²/9 - 16p + 144

(d) (11 + 8p)² = [(11)² + (2) (11) (8p) + (8p)²]

= 64p² + 176p + 121

(e) (p + q/3) (p - q/3) = [p² - (q/3)²]

= p² - q²/9

(f) (2a - 7a)² = [(2a)² - (2) (2a) (7a) + (7a)²]

= 4a² - 28a² + 49a²

= 25a²

(g) (7b - 2a)² = [(7b)² - (2) (7b) (2a) + (-2a)²]

= 4a² + 49b² - 28ab

(h) (x + 17) (x - 17) = [(x)² - (17)²]

= x² - 289

(i) (2x² + 1)² = [(2x²)² + (2) (2x²) (1) + (1)]

= 4x⁴ + 4x² + 1

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