Question

2ײ - 8× – 15
9ײ + 30× + 25 ​

Answer 1

Answer:

-19x

136x

Step-by-step explanation:

please mark as brainliest answer

Answer 2

Answer: Did a lot of effort to type plz mark me as the brainliest.

Step-by-step explanation:

2x²-8x-15

a= 2

b= -8

c= - 15

D = b²-4ac

  = (-8)²-4×2×(-15)

  = 64+120

  = 184

x = -b ± √D/2a

  =  -(-8) ± √184/2×2

  =  8 ± 2√46 / 4

  = 8 + 2√46/4   or   8 - 2√46/4

  = 2(4+√46)/4   or   2(4-√46)/4

  = 4+√46/2       or   4-√46/2

9x²+30x+25 =0

⇒ 9x²+15x+15x+25 = 0

⇒ 3x(3x+5)+5(3x+5) = 0

⇒ (3x+5)(3x+5) = 0

⇒ 3x+5 = 0   or   3x+5=0

⇒ x = -5/3   or    x = -5/3