Question

Oblicz. Temat to mnożenie sum algebraicznych.

( \sqrt{3} + 2\sqrt{2} ) (4 \sqrt{3}-8\sqrt{2})

(2\sqrt{5} - 4\sqrt{2}) ( 2\sqrt{2} + \sqrt{5})

Wykonaj działania.

(2a-b) (a+3b)- (a-4b)(2a+b)

(a-c)(2a+c-3)+ac

Answer 1

(2a-b)(a+3b)-(a-4b)(2a=b)= 2a^2+6ab-ab-3b^2-(2a^2+ab-8ab-4b^2)=2a^2+6ab-ab-3b^2-2a^2-ab+8ab+4b^2=b^2+12ab

(a-c)(2a+c-3)+ac=2a^2+ac-3a-2ac-c^2+3c+ac= 2a^2-c^2-3a+3c-2ac