Question

разложите на множители:1)а^2-49 2)64-b^2 3)c^2-2,25 4)2,89-d^2 5)64/81-x^2 6)100/121-y^2 7)z^2-169/196 8)t^2-400/441 9)25x^2-36 10)-16+49y^2 11)0,64-1/9z^2 12)4/25t^2-36

Answer 1

$1)(a - 7)(a + 7) \ 2)(8 - b)(8 + b) \ 3)(c - 1.5)(c + 1.5) \4) (1.7 - d)(1.7 + d) \ 5) (frac{8}{9} - x)( frac{8}{9} + x) \ 6)( frac{10}{11} - y)( frac{10}{11} + y) \ 7)( z - frac{13}{14} )(z + frac{13}{14} ) \ 8)(t - frac{20}{21} )(t + frac{20}{21} ) \ 9)(5x - 6)(5x + 6) \ 10)(7y - 4)(7y + 4) \ 11)(0.8 - frac{1}{3} z)(0.8 + frac{1}{3} z) \ 12) frac{2}{5}t - 6)( frac{2}{5} t + 6)$