Question

explain it please please please please ​

Answer 1

Answer:let base x

Then altitude is x-7

Hypotenuse is 13cm

By pythagores theorem

H square = base square + altitude square

13×13=x×x+(x-7)(x-7)

169=x square + x square-14x+49

169-49=2xsquare-14x

120=2xsquare-14x

2xsquare-14x-120=0

Xsquare-7x-60=0

Xsquare-12x+5x-60=0

X(x-12)+5(x-12)=0

(X+5)(x-12)=0

X=-5,12

Step-by-step explanation:

Answer 2

Answer:

Two sides of triangle are 15 & 7

Step-by-step explanation:

let the length of triangle is x and the altitude is x - 7

Use Pythagoras theorem

a2 + b2 = c2

x + (x - 7)^{2} = 13^{2}

x + x^{2} + 49 - 14x = 169

x^{2} - 14x - 120 = 0

x^{2} - 15x + 8x - 120 = 0

x(x - 15) + 8(x - 15) = 0

(x + 8)(x - 15) = 0

x = -8

x = 15

altitude = x - 7 = 15 - 7 = 8

base = 15