CLASE 34 –3 x x x x y y 2,1 y y 5x5x 5x5x 7 7 x x 2 2 y y 5 5 = 7 x 0 0 ( x 0) 4 x x 3 +2 x x 2 –1 P( x ) =
( a + b + c ) 2 = a2a2 +… b2b2 c2c2 2ab2ab 2ac2ac 2bc2bc ( a 1 + a 2 + a 3 +….+ a n ) = a n-1 a n a1a2a1a2 a1a3a1a3 a1a …… + anan 2 a2a2 2
Completa los espacios en blanco. 2 a)(6 x – y ) = x – xy y 2 x b) ( x + 8) = + x c) ( y – 7)( y + 7) = y 6 – d) ( p – 3 q )( p + 3 q ) = p – q 4 e) ( x – 6)( x + 9) = x 54 x – x 4 11x 2 – 22 f) ( x – 8)( x – 3) = 24 +
( x – 5) – [ ( x + 7)( x – 7) ]= –26 2 x –10 x + 25 – [ ] x – 49 = – 26 – x –10 x + 25 – x + 49 = – –10 x +74 = –26 –74 –10 x +74 = –26 –10 x = –100 :(–10) x =10 S = {10} –74 = (10 – 5) –[(10+7)( 10–7)] MI = 5 – [ 17 3] = 25 – = – 26 MD = – 26 MI = MD 10
Sean A (x) = 3x+5; B (x) =(4x–3)(x+2) a) Calcula S (x)= S (x) 2B (x) = A (x) – 2 = –2 (4x–3)(x+2) 9x + 30x + 25–2 (4x + 8x–3x–6) 2 2 9x + 30x – 8x– 10x x 2 – 8x 2 x x – 10x x+ 37 (3x+5) 2 =
b) Calcula S ( –5 ) S (x) = x x+ 37 S (–5)= (–5) (–5) + 37 = 25 – = –38 S (–5)
c) Para qué valor de x S (x) = T (x) si T (x) = 77 x + ( ) 77 x – ( ) x x+ 37= 77 x + ( ) 77 x – ( ) x x+ 37= x – 7 2 –37 20x = –7– 37 x = – x=2 1 5 S(x) T(x) :10
LIBRO DE DISTRIBUCIÓN GRATUITA. PROHIBIDA SU VENTA Capítulo 1 Epígrafe 4 Estudiar del Ejercicios 1 i, j, k, l, q 7 i, j
Realiza las operaciones indicadas y simplifica. (3y + 2z)(3y – 2z) (3m + 7n)(3m – 85n (a + b)(a + b) 2 (2 – t)(2 + t) 2 (a+b)(a – ab + b ) 2 2 (a–b)(a + ab + b ) 2 2