Question

puteti sa ma ajutati la 1,2,3 si 4 va rog?​

Answer 1

Sper ca te.am ajutat!

Answer 2

Răspuns:

Explicație pas cu pas:

(x + 4)^2 = x^2 + 8x + 16

(3x - 1)^2 = 9x^2 - 6x + 1

(2x + 3)(2x - 3) = 4x^2 - 9

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(2x - 5)^2 + 3(x - 2)(x + 2) - (x + 4)^2 = 4x^2 - 20x + 25 + 3(x^2 - 4) - (x^2 + 8x + 16) = 4x^2 - 20x + 25 + 3x^2 - 12 - x^2 - 8x - 16 = 6x^2 - 28x - 3

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x + y = 5

x^2 - y^2 = 15

x^2 - y^2 = (x + y)(x - y) = 15

x - y = 15 : 5 = 3

a = (x - y) + (x - y)^2 + (x - y)^3 = 3 + 9 + 27 = 39

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E = (4x + 3)^2 - (x- 2)^2 = (4x + 3 + x - 2)(4x + 3 - x + 2) = (5x + 1)(3x + 5)