Question

can someone please solve the 1 and 3rd question solve for x. ​

Answer 1

Answer:

1. X=5.66

2.dont know

in first you have to factorise it

Answer 2

Answer:

i)±13/3

iii){4, -9}

Step-by-step explanation:

$\sqrt {9x^2-25}=12\\9x^2-25=144\\9x^2=169\\x^2=\frac{169}{9} \\x=+/- 13/3\\\\\sqrt {3x+52}=x+4\\3x+52=(x+4)^2\\3x+52=x^2+16+8x\\x^2+16+8x-3x-52=0\\x^2+5x-36=0\\x^2+9x-4x-36=0\\x(x+9)-4(x+9)=0\\(x+9)(x-4)=0$

If x+9=0, x=-9

If x-4=0, x=4