Question

(9√5-3√2x)²

(7√3+8√2)²

(2-y)-(5+x)²​

Answer 1

Răspuns:

(9√5 - 3√2x)² = 18x² - 54√10 · x + 405

(7√3+8√2)² = 275 + 112√6

(2-y)-(5+x)²​ = -x² - 10x - y - 23

Explicație pas cu pas:

(9√5 - 3√2x)² = 81·5 - 2·27·√10 ·x + 9·2x² = 18x² - 54√10 · x + 405

(7√3+8√2)² = 49·3 + 2·56√6 + 64·2 = 147 + 112√6 + 128 = 275 + 112√6

(2-y)-(5+x)²​ = 2 - y - (25 + 10x + x²) = 2 - y - 25 - 10x - x² = -x² - 10x - y - 23