Ответ:
a) \( 2^2 - x^2 = 0 \)
\( 4 - x^2 = 0 \)
\( x^2 = 4 \)
\( x = \pm 2 \)
б) \( 9y^2 - 25 = 0 \)
\( 9y^2 = 25 \)
\( y^2 = \frac{25}{9} \)
\( y = \pm \frac{5}{3} \)
в) \( (2-x)^2 - x(x+1.5) = 4 \)
\( 4 - 4x + x^2 - x^2 - 1.5x = 4 \)
\( -5.5x = 0 \)
\( x = 0 \)
a) \( 2(3x - 2y)(3x + 2y) \)
\( 2(9x^2 - 4y^2) \)
\( 18x^2 - 8y^2 \)
б) \( (a^3 + b^2)^2 \)
\( (a^3)^2 + 2a^3b^2 + (b^2)^2 \)
\( a^6 + 2a^3b^2 + b^4 \)
\( (x + 4)^2 - 8(x + 4) \) при \( x = 0.25 \)
\( (0.25 + 4)^2 - 8(0.25 + 4) \)
\( (4.25)^2 - 8(4.25) \)
\( 18.0625 - 34 \)
\( -15.9375 \)
Ответ: