Question

efectuati ridicariile la putere si reduceti termeni asemenea
B
$(2x - 4) {}^{2} + (5x - 1) {}^{2}$
$(3x + 2) {}^{2} - (2x - 5) {}^{2}$
$(4x - 3) {}^{2} - (2x - 7) {}^{2}$
$(7x + 2) { }^{2} - (5x - 6) {}^{2}$
Repede!!
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Answer 1

$(2x - 4)^{2} +( 5x - 1)^{2} \\ 4x^{2} - 16x + 16 + {25x}^{2} - 10x + 1 \\ {29x}^{2} - 26x + 17$

${(3x + 2})^{2} - {( 2x - 5})^{2} \\ (3x + 2 - (2x - 5)) \times (3x + 2 + (2x - 5)) \\ (3x + 2 - 2x + 5) \times (3x + 2 + 2x - 5) \\ (x + 7)(5x - 3) \\ x \times 5 x - 3x + 7 \times 5x - 7 \times 3 \\ 5x ^{2} + 32x - 21$

${(4x - 3)}^{2} - {(2x - 7)}^{2} \\ (4x - 3 - (2x - 7)) \times (4x - 3 + (2x - 7)) \\ (4x - 3 - 2x + 7)(4x - 3 + 2x - 7) \\ (2x + 4)(6x - 10) \\ 2(x + 2) \times 2(3x - 5) \\ 4(x + 2) \times (3x - 5) \\ {(4x - 3)}^{2} - (2x - 7) ^{2} \\ {16x}^{2} - 24x + 9 - {4x}^{2} + 28x - 49 \\ 12x^{2} + 4x - 40$

${(7x + 2)}^{2} - {(5x - 6)}^{2} \\ (7x + 2 - (5x - 6)) \times (7x + 2 + (5x - 6)) \\ (7x + 2 - 5x + 6) \times (7x + 2 + 5x - 6) \\ (2x + 8) \times (12x - 4) \\ 2(x + 4) \times 4(3x - 1) \\ 8(x + 4)(3x - 1) \\ {(7x + 2)}^{2} - {(5x - 6)}^{2} \\ {49x}^{2} + 28x + 4 - {25x}^{2} + 60x - 36 \\ 24x ^{2} + 88x - 32$

la prima varianta am descompus expresia in factori si la a 2 a am simplificat expresia

Answer 2

Răspuns:

ai raspunsul in poza. Mult noroc